To distinguish between signals having very close values, we need an instrument with high resolution
Description : What principle is used to help distinguish between two cw signals that are close in frequency?
Last Answer : Heterodyning.
Description : need of calibration and explain the procedure to calibrate the instrument.
Last Answer : Need of calibration: Every measuring device degrades over time due to normal wear and tear. These changes can be caused by various reasons such as electric or mechanical shock or a hazardous manufacturing ... different magnitude are used to calculate the resistance based on ohm's law.
Description : Two sinusoidal signals of the same frequency are displayed on a dual-trace oscilloscope. One complete cycle of each signal covers 6 cm of the horizontal scale and the starting point of the horizontal scale and the starting ... between the two signals in degrees is (a) 30 (b) 45 (c) 60 (d) 90
Last Answer : Two sinusoidal signals of the same frequency are displayed on a dual-trace oscilloscope. One complete cycle of each signal covers 6 cm of the horizontal scale and the starting point of the horizontal ... signals are separated by 0.5 cm. The phase difference between the two signals in degrees is 30
Description : Transient signals can be observed using (a) storage oscilloscope (b) sampling oscilloscope (c) wave analyzer (d) spectrum analyzer
Last Answer : Transient signals can be observed using storage oscilloscope
Description : An analog voltmeter has a sensitivity of 10kΩ/volt. The galvanometer used in constructing the instrument will produce a full scale deflection when the current passed through it is (a) 10 mA (b) 20 mA (c) 50 mA (d) 100 μA
Last Answer : An analog voltmeter has a sensitivity of 10kΩ/volt. The galvanometer used in constructing the instrument will produce a full scale deflection when the current passed through it is 100 μA
Description : How does heterodyning distinguish between cw signals?
Last Answer : By giving a different beat frequency for each signal.
Description : Distinguish between continuous valued and discrete valued signals
Last Answer : If a signal takes on all possible values on a finite or an infinite range, it is said to be continuous valued signal. If a signal takes on values from a finite set of possible values, it is said to be discrete-valued signal.
Description : Very small displacements are effectively measured using
Last Answer : Very small displacements are effectively measured using LVDT
Description : In a particular circuit connection, AWG 18 wire is selected over AWG 22. The reason is that it is having
Last Answer : In a particular circuit connection, AWG 18 wire is selected over AWG 22. The reason is that it is having Higher current carrying capacity
Description : The ADC having highest conversion speed is (A) Dual-slope ADC (B) Successive approximation ADC (C) Flash ADC (D) Servo ADC
Last Answer : The ADC having highest conVersion speed is Flash ADC
Description : What characteristic of sound enables a person to distinguish one musical instrument from another, if they are all playing the same note?
Last Answer : Quality.
Description : Which of the following statements defines culture? a) The learned patterns of behavior, beliefs, and values that can be attributed to a particular group of people. Included among ... . The classification of a group based upon certain distinctive characteristics describes the term ethnicity.
Last Answer : a) The learned patterns of behavior, beliefs, and values that can be attributed to a particular group of people. Included among characteristics that distinguish cultural groups are manner of dress, values, artifacts, and health beliefs and practices.
Description : What term is used to describe the ability of a radar system to distinguish between targets that are close together?
Last Answer : Target resolution
Description : What is a microscope's ability to distinguish between separate objects that are close together? (A) Magnification (B) Contrast (C) Resolving power (D) Scanning power
Last Answer : (C) Resolving power
Description : I would like to enroll my 10 yr old son in a military school next year, he will be in 5th grade. He is out of control and very disrespectful. He's been having deciplinary problems since kindergarten. I need a military school that is close to my area. ?
Last Answer : It sounds like possibly he many be ADD or ADHD which is a disorder in many kids, I would ck. with his doctor first, 2nd be firm, set rules, give love, put him on a set schedule. This ... to me he needs time out, or maybe u do!Check with your doctor. try looking here www.boardingschoolreview.com/
Description : What is an endoscope? (1) It is an optical instrument used to see inside the alimentary canal (2) It is a device which is fitted on the chest of the patient to regularize the ... used for examining ear disorders (4) It is an instrument for recording electrical signals produced by human muscles
Last Answer : (1) It is an optical instrument used to see inside the alimentary canal Explanation: Endoscopymeans looking inside and typically refers to looking inside the body for medical reasons using ... : breathing disorders; chronic diarrhea; internal bleeding; irritable bowel syndrome; stomach ulcers, etc.
Description : A device or instrument, which delivers signals of precise frequency and amplitude, usually over a wide range
Last Answer : signal generators
Description : In RF and microwave system, what instrument is used to measure the incidental and reflected signals?
Last Answer : reflectometer
Description : What is an endoscope ? (1) It is an optical instrument used to see inside the alimentary canal (2) It is a device which is fitted on the chest of the patient to regularise the ... used for examining ear disorders (4) It is an instrument for recording electrical signals produced by human muscles
Last Answer : It is an optical instrument used to see inside the alimentary canal
Description : A device that transforms values of physical variables into equivalent electrical signals is called_____________
Last Answer : Ans- Transducer
Description : _______ signals canhave only alimited number of values. A) Analog B) Digital C) (a) or (b) D) None of the above
Last Answer : Digital
Description : _____ signals can have an infinite number of values ina range. A) Analog B) Digital C) (a) or (b) D) None of the above
Last Answer : Analog
Description : Which characteristic is this? We can distinguish between sound having same pitch and loudness. a)tone b)note c)pitch d)timbre
Last Answer : d)timbre
Last Answer : If an instrument has cramped scale for larger values, then it follows logarithmic law.
Description : Flash distillation is suitable for the separation of components (A) Having very close boiling points (B) Which form maximum boiling azeotrope (C) Having very wide boiling points (D) Which form minimum boiling azeotrope
Last Answer : (C) Having very wide boiling points
Description : Important microbiological features of ciprofloxacin include the following except (a) Long postantibiotic effect (b) Marked suppression of intestinal anaerobes (c) MBC values close to MIC values (d) Slow development of resistance
Last Answer : Ans: B
Description : Important microbiological features of ciprofloxacin include the following except: A. Long postantibiotic effect B. Marked suppression of intestinal anaerobes C. MBC values close to MIC values D. Slow development of resistance
Last Answer : B. Marked suppression of intestinal anaerobes
Description : Compare Dual slope DVM and SAR type DVM.
Last Answer : Sr no Dual slope DVM SAR type DVM 1 It is highly accurate It is moderately accurate 2 Cost is high It is inexpensive 3 Two comparator is used One comparator is used ... resolution Good resolution 5 Slow speed High speed 6 Less Error More error
Description : block diagram of logic analyzer.
Last Answer : A logic analyzer can be triggered on a complicated sequence of digital events, then capture a large amount of digital data from the system under test (SUT).When logic analysers first came ... Once the data are captured, they can be displayed several ways, from the simple) to the complex
Description : operation of DSO with block diagram.
Last Answer : The input is amplified and attenuated with input amplifiers. The output of the input signal amplifiers feeds an analog to digital converter (ADC). There are numbers of ADC available. But the selection of ADC ... view the display on the CRT, the data from memory is reconstructed in analog form.
Description : sketch time period measurement by CRO.
Last Answer : Horizontal sweep is turned ON and the display appealing on the screen is adjusted by varying different control knobs provided on the front panel of CRO, till the signal is suitably displayed ... Where m=Number of division in one complete cycle n=Setting of time base =Time/Division
Description : operation of ramp type DVM.
Last Answer : This is given to an input comparator which will compare two signals and generates the output. One input to the input comparator is from the input and another input is from the ramp. This input voltage and ... ground and output is given. This output will stop the flow of purchase from clock
Description : operation of half wave rectifier type AC Voltmeter.
Last Answer : Half-wave Rectifier Voltmeter The d'Arsonval meter movement only responds to the average or dc value of the current through the moving coil. In order to measure alternating ... ) input voltage signal alternating signal needs to be rectified first by using diode rectifier to produce
Description : operation of whetstone bridge.
Last Answer : A Wheatstone bridge is widely used to measure the electrical resistance. This circuit is built with two known resistors, one unknown resistor and one variable resistor connected in the form of bridge. ... using a Wheatstone Bridge the unknown electrical resistance value can easily measure.
Description : role of the series resistance connected in PMMC movement.
Last Answer : A PMMC Instrument can be used as voltmeter by just connecting a series resistance with the moving coil. This series resistance is called Voltmeter Multiplier. This combination of moving coil and ... current whose voltage is to be measured. Ideally the resistance of voltmeter should be infinite
Description : different types of errors occurs in measurement.
Last Answer : Generally errors are classified into three types: systematic errors, random errors and blunders. 1) Gross Errors 2) Random Errors 3) Systematic Errors Instrumental Errors Environmental ... to wrong observations or reading in the instruments particularly in case of energy meter reading.
Description : tern null as it applies to bridge measurement.
Last Answer : Null measurements balance voltages so that there is no current flowing through the measuring device and, therefore, no alteration of the circuit being measured. Null measurements are generally more ... the use of standard voltmeters and ammeters, and they still have limits to their precision.
Description : application of CRO.
Last Answer : Applications of CRO: 1) Voltage measurement. 2) Current measurement. 3) Measurement of phase difference. 4) Measurement of phase. 5) Measurement of frequency. 6) Measurement of inductance. ... in various circuits. 17) For checking transistor. 18) It can measure short time interval.
Description : How many non-overlapping channels are available in IEEE 802.11b
Last Answer : 3 non-overlapping channels are available in IEEE 802.11b
Description : Number of comparators required for an 8 bit flash ADC is: (1) 8 (2) 16 (3) 255 (4) 256
Last Answer : Number of comparators required for an 8 bit flash ADC is: 255
Description : In D/A converter, the resolution required is 50mv and the total maximum input is 10v. The number of bits required is (A) 7 (B) 8 (C) 9 (D) 200
Last Answer : In D/A converter, the resolution required is 50mv and the total maximum input is 10v. The number of bits required is 8
Description : Choose the correct statement (a) Digital multimeters are built using current measuring elements, while analog multimeters are built using voltage measuring units (b) Digital multimeters are built ... measuring units (d) Both digital and analog multimeters are built using current measuring units
Last Answer : Choose the correct statement (a) Digital multimeters are built using current measuring elements, while analog multimeters are built using voltage measuring units (b) Digital multimeters are built ... measuring units (d) Both digital and analog multimeters are built using current measuring units
Description : An optical fiber cable laid underground has developed a discontinuity at a distance d from the source end. The fault can be located using the instrument (a) Optical spectrum Analyzer (OSA) (b) Optical Time Domain Reflectometer (OTDR) (c) Optical Power Meter (OPM) (d) Laser Diffractometer (LD)
Last Answer : An optical fiber cable laid underground has developed a discontinuity at a distance d from the source end. The fault can be located using the instrument Optical Time Domain Reflectometer (OTDR)
Description : The trace on an oscilloscope continually moves to the right of the screen when (a) the sweep is triggered. (b) the sweep period is larger than the signal period. (c) the sweep period is smaller than the signal period. (d) there is no weep.
Last Answer : The trace on an oscilloscope continually moves to the right of the screen when the sweep period is smaller than the signal period.
Description : In a dual trace oscilloscope, the display appears segmented when (a) low frequency signals are observed in Alternate mode (b) low frequency signals are observed in Chop mode (c) high frequency signals are observed in Alternate mode (d) high frequency signals are observed in Chop mode
Last Answer : In a dual trace oscilloscope, the display appears segmented when high frequency signals are observed in Chop mode
Description : In a weighted-resistor digital-to-analog converter with 8-bit input, if the resistance corresponding to the MSB is 2K, what will be the resistance corresponding to the LSB? (a) 250 Ω (d) 512 KΩ (c) 256 KΩ (d) 25.5 Ω
Last Answer : In a weighted-resistor digital-to-analog converter with 8-bit input, if the resistance corresponding to the MSB is 2K, what will be the resistance corresponding to the LSB? (a) 250 Ω (d) 512 KΩ (c) 256 KΩ (d) 25.5 Ω
Description : ESD stands for
Last Answer : ESD stands for Electro static Discharge
Description : Y –axis in a CRO normally represents
Last Answer : Volt
Description : What are the types of error?
Last Answer : Human error or gross error, systematic error, applicational error and random error are the types of error.
Description : What are the factors influencing measurement errors?
Last Answer : The factor influencing measurement errors are accuracy, precision, range and bandwidth, sensitivity, resolution and uncertainty.