Consider the following statements with regard to Lissajous pattern on a CRO : 1. It is a stationary pattern on...

Consider the following statements with regard to Lissajous pattern on a CRO : 

1. It is a stationary pattern on the CRO. 

2. It is used for precise measurement of frequency of a voltage signal. 

3. The ratio between frequencies of vertical and longitudinal voltage signals should be an integer to have a steady Lissajous pattern. 

Which of the above statements is/are correct ? 

(a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3
by

1 Answer

Answer :

Consider the following statements with regard to Lissajous pattern on a CRO : 

1. It is a stationary pattern on the CRO. 

2. It is used for precise measurement of frequency of a voltage signal. 

3. The ratio between frequencies of vertical and longitudinal voltage signals should be an integer to have a steady Lissajous pattern. 

Which of the above statements is/are correct ? 

(a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

by

Related questions

The Lissajous pattern on the screen of a CRO is an ellipse with major axis in quadrant 2 and quadrant 4.

Description : The Lissajous pattern on the screen of a CRO is an ellipse with major axis in quadrant 2 and quadrant 4. Then the phase difference between two signals Can be :  (A) 270° (B) 210° (C) 180° (D) 300°

Last Answer : The Lissajous pattern on the screen of a CRO is an ellipse with major axis in quadrant 2 and quadrant 4. Then the phase difference between two signals Can be : 210°

Lissajous pattern obtained on a CRO screen is a circle. Frequency of two signals are

Description : Lissajous pattern obtained on a CRO screen is a circle. Frequency of two signals are   (a) Equal (b) Unequal (c) Zero (d) Infinity 

Last Answer : a

The Lissajous pattern obtained on a CRO in used to determine:

Last Answer : The Lissajous pattern obtained on a CRO in used to determine: Phase shift and frequency

The Lissajous pattern observed on screen of CRO is a straight line inclined at 45° to x axis. If X–plate input is

Description : The Lissajous pattern observed on screen of CRO is a straight line inclined at 45° to x axis. If X–plate input is 2 sin ωt, the Y–plate input is (1) 2 sin ωt (2) 2 sin (ωt + 45°) (3) 2 sin (ωt – 45°) (4) 22 sin ωt + 45°) 

Last Answer : The Lissajous pattern observed on screen of CRO is a straight line inclined at 45° to x axis. If X–plate input is 2 sin ωt, the Y–plate input is 2 sin ωt 

Describe with suitable example; frequency measurement by Lissajous patterns on CRO.

Description : Describe with suitable example; frequency measurement by Lissajous patterns on CRO. 

Last Answer : * Initially the unknown frequency signal is connected to vertical deflection plates of CRO. * Now switch of the internal sweep generator of the horizontal deflecting system. * A standard source ... explain by following example: Assume horizontal input frequency is 10 kHz for following pattern

Explain measurement of phase and frequency using Lissajous pattern. Write the formula for each one.

Description : Explain measurement of phase and frequency using Lissajous pattern. Write the formula for each one.

Last Answer : Phase measurement of Lissajous pattern: The phase measurement can be done by using Lissajous figures. The CRO is set to operate in the X- Y mode, then the display obtained on the screen of a ... or sub- multiple of the unknown frequency.  The Lissajous pattern appears stationary.     

Define Lissajous pattern. Explain how Lissajous pattern is useful for frequency and phase measurement.

Description : Define Lissajous pattern. Explain how Lissajous pattern is useful for frequency and phase measurement.

Last Answer : Lissajous Pattern : The CRO is set to operate in the X- Y mode, when two sine waves of the same frequency are applied to the CRO (One vertical and one horizontal deflection plates) then the display obtained on ... 1. Lissajous pattern for ratio 3:1    2. Lissajous pattern for ratio 3:2  

The two inputs of a CRO are fed with two stationary periodic signals. In the X-Y mode, the screen shows a

Description : The two inputs of a CRO are fed with two stationary periodic signals. In the X-Y mode, the screen shows a figure Which changes from ellipse to circle and back to ellipse with its major ... frequencies very close but not equal D) There is a constant but small phase difference between the signals

Last Answer : The two inputs of a CRO are fed with two stationary periodic signals. In the X-Y mode, the screen shows a figure Which changes from ellipse to circle and back to ellipse with ... following inference can be made from this The signals are sinusoidal with their frequencies very close but not equal 

Consider the following statements with regard to power diodes : 1. The breakdown voltage is directly...

Description : Consider the following statements with regard to power diodes : 1. The breakdown voltage is directly proportional to the doping density of the drift region. 2. Losses in the diode are ... vertically oriented structure supports large blocking voltages. Which of the above statements is/are correct ?

Last Answer : Consider the following statements with regard to power diodes : 1. The breakdown voltage is directly proportional to the doping density of the drift region. 2. Losses in the diode are less due to ... large blocking voltages. Which of the above statements is/are correct ? 2 only

Consider the following statements with regard to a GTO : 1. The turn-off gain of the GTO is large....

Description : Consider the following statements with regard to a GTO : 1. The turn-off gain of the GTO is large. 2. Large negative gate current pulses are required to turn off the GTO. 3. GTO has large reverse blocking capability. Which of the ... is/are correct ? (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements with regard to a GTO : 1. The turn-off gain of the GTO is large. 2. Large negative gate current pulses are required to turn off the GTO. 3. GTO has large reverse blocking capability. Which of ... is/are correct ? (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Consider the following statements with regard to induction type wattmeter : 1. Can be used on both ac and...

Description : Consider the following statements with regard to induction type wattmeter :  1. Can be used on both ac and dc systems.  2. Power consumption is relatively low.  3. It is accurate only at stated frequency and temperature.  Which ... /are correct ?  (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements with regard to induction type wattmeter :  1. Can be used on both ac and dc systems.  2. Power consumption is relatively low.  3. It is accurate only at stated frequency and temperature. ... correct ?  (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Consider the following statements with regard to Moving Iron (MI) instruments : 1. These instruments ...

Description : Consider the following statements with regard to Moving Iron (MI) instruments :  1. These instruments possess high operating torque.  2. These instruments can be used in ac and dc circuits.  3. Power consumption in these instruments ... and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements with regard to Moving Iron (MI) instruments :  1. These instruments possess high operating torque.  2. These instruments can be used in ac and dc circuits.  3. Power consumption in these ... 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Consider the following statements with regard to inverters 1. Line commutated inverters can function as

Description : Consider the following statements with regard to inverters 1. Line commutated inverters can function as isolated ac sources 2. Force commutated inverters can provide independent ac voltage with adjustable voltage and frequency 3. Thyrister ... correct statements are A)1,3 B)1,3,4 C) 2,4 D) 1,4

Last Answer : Consider the following statements with regard to inverters 1. Line commutated inverters can function as isolated ac sources 2. Force commutated inverters can provide independent ac voltage with adjustable voltage and frequency 3. ... correct statements are A)1,3 B)1,3,4 C) 2,4 D) 1,4

Satellite the orbits in a circular pattern with an angular velocity equal to that of the earth A. Geostationary B. Early Bird I C. Syncorn I D. Stationary satellite

Description : Satellite the orbits in a circular pattern with an angular velocity equal to that of the earth A. Geostationary B. Early Bird I C. Syncorn I D. Stationary satellite

Last Answer : A. Geostationary

Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following statement(s) is/are true concerning antimicrobial classes? a. Penicillins and cephalosporins share the compound structure of a b-lactam ring which binds to bacterial division plate proteins b. Tetracyclines and macrolides such as erythromycin inhibit bacterial ribosomal activity and therefore protein synthesis c. Aminoglycosides act in a similar fashion to tetracyclines and therefore are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis

Description : Antibacterial agents can be classified with regard to their structure, mechanism of action, and activity pattern against various types of bacterial pathogens. Which of the following ... are both bacteriostatic d. Sulfonamides and trimethoprim act synergistically to inhibit purine synthesis

Last Answer : Answer: a, b, d Penicillins, cephalosporins, and monobactams possess a b-lactam ring of some type and act to bind bacterial division plate proteins, thus inhibiting cell wall ... act in different mechanisms to inhibit protein synthesis, therefore two agents in combination act synergistically

With regard to blood groups and blood products: a. the ABO system is inherited in an autosomal dominant pattern b. group O and Rhesus positive is the universal donors' blood. c. stored whole blood contains dextrose, phosphate and citrate d. stored blood becomes progressively more acidotic and hyperkalaemic with time

Description : With regard to blood groups and blood products: a. the ABO system is inherited in an autosomal dominant pattern b. group O and Rhesus positive is the universal donors' blood. ... dextrose, phosphate and citrate d. stored blood becomes progressively more acidotic and hyperkalaemic with time

Last Answer : stored blood becomes progressively more acidotic and hyperkalaemic with time

With regard to pattern electroretinogram: a. it can be used to estimate the visual acuity b. it is generated by the occipital cortex c. it is reduced in optic nerve diseases d. the signal amplitude is about 10 mV

Description : With regard to pattern electroretinogram: a. it can be used to estimate the visual acuity b. it is generated by the occipital cortex c. it is reduced in optic nerve diseases d. the signal amplitude is about 10 mV

Last Answer : it is reduced in optic nerve diseases

Consider the following statements : 1. There is no flow across a streamline 2. Streamline spacing varies directly with velocity at the section 3. Streamlines do not cross 4. In steady flow, streamline pattern does not change with time Which of these statements in respect of stream flow pattern are correct? (a) 1, 2, 3 and 4 (b) 1 and 2 only (c) 1, 3 and 4 only (d) 2, 3 and 4 only

Description : Consider the following statements : 1. There is no flow across a streamline 2. Streamline spacing varies directly with velocity at the section 3. Streamlines do not cross 4. In steady flow, streamline pattern does not change with ... 4 (b) 1 and 2 only (c) 1, 3 and 4 only (d) 2, 3 and 4 only

Last Answer : (c) 1, 3 and 4 only

On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal. (A) Frequency (B) Amplitude (C) Damping (D) None of these

Description : On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal. (A) Frequency (B) Amplitude (C) Damping (D) None of these

Last Answer : (A) Frequency

A piano tuner notices a standing Lissajous (pron: Liss-a-jew) curve on his oscilloscope. The tone being projected is: w) out of harmony x) sharp y) resonating z) flat

Description : A piano tuner notices a standing Lissajous (pron: Liss-a-jew) curve on his oscilloscope. The tone being projected is: w) out of harmony x) sharp y) resonating z) flat

Last Answer : ANSWER: Y -- RESONATING

What will be the phase shift for following Lissajous patterns?

Description : What will be the phase shift for following Lissajous patterns?

Last Answer : (i) Phase shift = 0° (ii) Phase shift = 90° or 270° (iii) Phase shift = 30° or 330° (iv) Phase shift = 180°

State significance of Lissajous figure.

Description : State significance of Lissajous figure. 

Last Answer : Significance of Lissajous figure. The characteristics patterns that appear on the screen of a cathode ray tube, when sinusoidal voltages are simultaneously applied to horizontal and vertical plates .these ... is presented as a Lissajous figure. it is used for measurement of phase and frequency.

A Lissajous patterns are used to measure

Last Answer : A Lissajous patterns are used to measure Frequency and Phase shift.

.Which of the following statements is correct regarding evolution of mankind? (a) Homo erectus is preceded by Homo habilis. (b) Neanderthal man and cro-magnon man were living at the same time. (c) Australopithecus was living in Australia. (d) None of these

Description : .Which of the following statements is correct regarding evolution of mankind? (a) Homo erectus is preceded by Homo habilis. (b) Neanderthal man and cro-magnon man were living at the same time. (c) Australopithecus was living in Australia. (d) None of these

Last Answer : d) None of these

Which one of the following statements is correct? (a) Australopithecus is the real ancestor of modern man. (b) Neanderthal man is the direct ancestor of Homo sapiens. (c) Homo erectus is the ancestor of man. (d) Cro-magnon man’s fossil has been found in Ethiopia.

Description : Which one of the following statements is correct? (a) Australopithecus is the real ancestor of modern man. (b) Neanderthal man is the direct ancestor of Homo sapiens. (c) Homo erectus is the ancestor of man. (d) Cro-magnon man’s fossil has been found in Ethiopia.

Last Answer : (d) Cro-magnon man’s fossil has been found in Ethiopia.

Compare analog CRO with digital storage oscilloscope (DSO).

Description : Compare analog CRO with digital storage oscilloscope (DSO).

Last Answer : Analog CRO DSO 1 High bandwidth Less bandwidth due to aliasing effect 2 High  writing speed about 15 GHz Limited speed 3 No memory Has memory ... Less storage time. The digital oscilloscope is  capable of an infinite storage time, using its digital memory.

List any four measure knobs on front panel on CRO.

Description : List any four measure knobs on front panel on CRO.

Last Answer : Knobs on front panel of CRO: 1. Power ON- OFF 2. Intensity control 3. Focus control 4. Astigmatism control 5. Volt/Div control 6. Vertical position control 7. Invert 8. Horizontal position control 9. Synchronization. 10. Channel selection.

List any two applications of CRO.

Description : List any two applications of CRO.

Last Answer : Applications of CRO: 1) Measurement of phase and frequency. 2) Measurement of inductance and capacitance. 3) Tracing the waveform. 4) Determination of amplitude of variable quantity. 5) In ... in transmission lines 9) To check faulty components in various circuit 10) For tracing transistor curves

Draw block diagram of CRO. Write function of each block.

Description : Draw block diagram of CRO. Write function of each block.

Last Answer : 1. Vertical amplifier strengthens the input signal applied to vertical depleting plates 2. Trigger circuit gives input to time base circuit 3. The output of time base generator is amplified by ... of CRT internally coated with Phosphors material on which we observe waveform of the input signal.

Delay line is essential in a CRO, to ensure that

Description : Delay line is essential in a CRO, to ensure that (a) Vertical signal starts after the retrace period of sweep signal (b) The sweep reaches the horizontal plates before the desired signal under consideration (c) Initial part of signal to be observed is not lost (d) All of the above

Last Answer : Delay line is essential in a CRO, to ensure that (a) Vertical signal starts after the retrace period of sweep signal (b) The sweep reaches the horizontal plates before the desired signal under consideration (c) Initial part of signal to be observed is not lost (d) All of the above

The function of input attenuators in measuring instruments, like VTVM and CRO, is to

Description : The function of input attenuators in measuring instruments, like VTVM and CRO, is to (a) Increase the input impedance (b) Attenuate the frequency range (c) Attenuate the input signal amplitude without altering the frequency contents (d) Attenuate the input impedance

Last Answer : The function of input attenuators in measuring instruments, like VTVM and CRO, is to Attenuate the input signal amplitude without altering the frequency contents

CRO is used to measure ________.

Description : CRO is used to measure ________. A. Amplitude B. Phase difference C. Frequency D. All of these 

Last Answer : D

CRO is used to _________.

Description : CRO is used to _________. A. produce frequency B. measure frequency C. produce phase difference D. none of these 

Last Answer : CRO is used to measure frequency.

In a CRO, the quantity to be measured is applied across

Description : In a CRO, the quantity to be measured is applied across  (1) focusing electrodes (2) cathode (3) Y-plates (4) X-plates

Last Answer : C

Horizontal deflection plates of CRO are placed generally

Description : Horizontal deflection plates of CRO are placed generally   (a) Horizontal (b) Vertical (c) Diagonal (d) (a) or (b)  

Last Answer : Horizontal

In genetic engineering, a DNA segment (gene) of interest, is transferred to the host cell through a vector. Consider the following four agents (i-iv) in this regard and select the correct option about which one or more of these can be used as a vector/vectors. (i) Bacterium (ii) Plasmid (iii)Plasmodium (iv) Bacteriophage (a) (i), (ii) and (iv) (b) (i) only (c) (i) and (iii) (d) (ii) and (iv)

Description : In genetic engineering, a DNA segment (gene) of interest, is transferred to the host cell through a vector. Consider the following four agents (i-iv) in this regard and select the correct option about which one or more of these ... ii) and (iv) (b) (i) only (c) (i) and (iii) (d) (ii) and (iv)

Last Answer : (d) (ii) and (iv)

Consider the following statement: (1) There is no difference between the English Law and Indian Law with regard to acceptance through post. (2) Both Under the English Law and the Indian Law a contract is concluded when the letter of acceptance is posted. (3) Under the Indian Law when the Letter of acceptance is posted it is completed only as against the proposer. Which of the above statement is/are correct? (a)1 and 2 (b) 2 alone (c) 3 alone (d) None

Description : Consider the following statement: (1) There is no difference between the English Law and Indian Law with regard to acceptance through post. (2) Both Under the English Law and the Indian Law a contract is concluded when the ... statement is/are correct? (a)1 and 2 (b) 2 alone (c) 3 alone (d) None

Last Answer : (c) 3 alone

Which one of the following statements is not correct ? (a) A surveyor’s compass has two sight vanes (b) A prismatic compass has an object vane and an eye vane (c) A trough compass is an accessory to a plane table (d) In a prismatic compass the graduations on the aluminimum disc rotate and the index remains stationary

Description : Which one of the following statements is not correct ? (a) A surveyor's compass has two sight vanes (b) A prismatic compass has an object vane and an eye vane (c) A trough compass ... table (d) In a prismatic compass the graduations on the aluminimum disc rotate and the index remains stationary

Last Answer : (a) A surveyor’s compass has two sight vanes

For a point charge to feel a net force in a homogeneous magnetic field, which one of the following statements is true? The charge must: w) move parallel to the magnetic lines of flux x) have a component of its motion perpendicular to the lines of flux y) be stationary z) be a positive charge

Description : For a point charge to feel a net force in a homogeneous magnetic field, which one of the following statements is true? The charge must: w) move parallel to the magnetic lines of flux x) have a component of its motion perpendicular to the lines of flux y) be stationary z) be a positive charge

Last Answer : ANSWER: X -- HAVE A COMPONENT OF ITS MOTION PERPENDICULAR TO THE LINES OF FLUX 

which of the following statements is true with regard to pakistan -General Knowledge

Description : which of the following statements is true with regard to pakistan -General Knowledge

Last Answer : A. Religion has no role in the legal system.

in regard to exercise, which of the following statements about safety consideration is correct? -General Knowledge

Description : in regard to exercise, which of the following statements about safety consideration is correct? -General Knowledge

Last Answer : In regard to exercise, the following statement about safety consideration is correct: Remaining well-hydrated while exercising is best.

which of the following statements is correct in regard to apical and floral meristems? -General Knowledge

Description : which of the following statements is correct in regard to apical and floral meristems? -General Knowledge

Last Answer : (B) Apical meristems are sometimes changed into floral meristems

Which one of the following statements in regard to the excretion by the human kidneys is correct?

Description : Which one of the following statements in regard to the excretion by the human kidneys is correct?

Last Answer : Which one of the following statements in regard to the excretion by the human kidneys is ... glomerular filtrate is reabsorbed by the renal tubules

Which one of the following statements in regard to the excretion by the human kidneys is correct?

Description : Which one of the following statements in regard to the excretion by the human kidneys is correct?

Last Answer : Which one of the following statements in regard to the excretion by the human kidneys is correct ... of Loop of Henly is impermeable to electrolytes

Which of these statements is not true with regard to starting a new job?

Description : Which of these statements is not true with regard to starting a new job?

Last Answer : No one will be paying any attention to you or watching to see what type of person you are.

Which of the following statements is true with regard to the erratic behaviour of Indian monsoons? (a) Uniform duration but varying amounts of rain from one year to another, as well as at different places (b) Uncertain date of onset and withdrawal, as well as unequal distribution of rain (c) Uncertain date of onset and withdrawal as well as varying amounts of rainfall during different years (d) Uniform duration but varying amounts of rain from place to place

Description : Which of the following statements is true with regard to the erratic behaviour of Indian monsoons? (a) Uniform duration but varying amounts of rain from one year to another, as well as at ... of rainfall during different years (d) Uniform duration but varying amounts of rain from place to place

Last Answer : Ans: (c)

Eicosanoids mediate inflammation in a variety of ways. Of the following statements, which are true with regard to this? a. Eicosanoids are stored in cytoplasmic granules for release after receptor mediated signaling b. Eicosanoids include prostaglandins, thromboxanes, leukotrienes and lipoxins c. Eicosanoids generally have a plasma half-life measured in hours d. Physiologic responses to eicosanoids include vasodilatation, vasoconstriction, increased vascular permeability and both chemotaxis and chemoattractant inhibition

Description : Eicosanoids mediate inflammation in a variety of ways. Of the following statements, which are true with regard to this? a. Eicosanoids are stored in cytoplasmic granules ... include vasodilatation, vasoconstriction, increased vascular permeability and both chemotaxis and chemoattractant inhibition

Last Answer : Answer: b, d The eicosanoids are derived from arachidonic acid (eicosatetraenoic acid) and consist of prostaglandins, thromboxanes, leukotrienes and lipoxins. The eicosanoids are not ... nervous system d. Mononuclear phagocytes release a variety of proinflammatory cytokines and growth factors

With regard to the rate of return on investment (ROI), which one of the following statements is not valid ? (A) It is an overall indicator of the profitability of an enterprise (B) It is a triangular relationship in the sense that ROI = Profit margin ×Asset turnover (C) It is a superior measure compared to the cash flow generated per share (D) It was first developed by Dupont, USA

Description : With regard to the rate of return on investment (ROI), which one of the following statements is not valid ? (A) It is an overall indicator of the profitability of an enterprise (B) It is a ... superior measure compared to the cash flow generated per share (D) It was first developed by Dupont, USA

Last Answer : Answer: It is a superior measure compared to the cash flow generated per share

With regard to the powers of the Rajya Sabha, which one among the following statements is not correct? (1) A money bill cannot be introduced in the Rajya Sabha (2) The Rajya Sabha has no power either to reject or amend a money bill (3) The Rajya Sabha cannot discuss the Annual Financial Statement (4) The Rajya Sabha has no power to vote on the Demands for Grants

Description : With regard to the powers of the Rajya Sabha, which one among the following statements is not correct? (1) A money bill cannot be introduced in the Rajya Sabha (2) The Rajya Sabha has no power ... the Annual Financial Statement (4) The Rajya Sabha has no power to vote on the Demands for Grants

Last Answer : (3) The Rajya Sabha cannot discuss the Annual Financial Statement Explanation: A Money Bill cannot be introduc in Rajya Sabha. Rajya Sabha has no power either to reject or amend a Money Bill. It ... Sabha may discuss the Annual Financial Statement. It has no power to vote on the Demands for Grants.