Description : Which of the following ECG waveforms characterizes conduction of an electrical impulse through the left ventricle? a) QRS complex The QRS complex represents ventricular depolarization b) P ... QT interval is an ECG characteristic reflecting the time from ventricular depolarization to repolarization.
Last Answer : a) QRS complex The QRS complex represents ventricular depolarization
Description : When the post-cardiac surgery patient demonstrates restlessness, nausea, weakness, and peaked T waves, the nurse reviews the patient's serum electrolytes anticipating which abnormality? a) Hyperkalemia ... likely be indicated by weakness, fatigue, and confusion without change in T wave formation
Last Answer : a) Hyperkalemia Hyperkalemia is indicated by mental confusion, restlessness, nausea, weakness, and dysrhythmias (tall, peaked T waves).
Description : The number of half-wave patterns in the "b" dimension of rectangular waveguides is indicated by which of the two descriptive subscripts?
Last Answer : Second.
Description : When you zero a synchro with a synchro tester, what is indicated by a jump in the synchro tester's dial when the S1 and S3 leads are momentarily shorted?
Last Answer : The synchro under test is not on electrical zero.
Description : Waveforms are described in terms of what two functions?
Last Answer : Amplitude and time.
Description : In applications where electronic waveforms are displayed on a CRT screen, the input signal is normally applied to what CRT element?
Last Answer : The vertical-deflection plate.
Description : Name two instruments used to analyze waveforms.
Last Answer : Oscilloscope and spectrum analyzer.
Description : The waveforms shown below are the input and output of an overdrive
Last Answer : a. Cutoff. b. Saturation.
Description : What waveform is the basis of all complex waveforms?
Last Answer : The sine wave.
Description : Explain the operation of a full wave bridge rectifier with π filter using a neat diagram. Draw input and output waveforms.
Last Answer : During positive half-cycle of input, the secondary voltage VAB is positive, so diodes D1 and D2 forward biased and D3 and D4 reverse biased. The load current flows from terminal A ... smooth DC voltage appears across the load. The input and output waveforms are shown in the figure.
Description : Draw the circuit diagram and describe the working principle of full wave bridge rectifier. Draw its waveforms.
Last Answer : During the first half cycle : During the first half cycle of the input voltage, the upper end of the transformer secondary winding is positive with respect to the lower end. Thus during the first ... , terminal D, diode D4, and terminal A back to transformer and output will positive half cycle.
Description : Draw circuit diagram and waveforms for centre-tap full wave rectifier.
Last Answer : Circuit Diagram:
Description : Define rectifier. Draw circuit diagram and input-output waveforms of bridge type full wave rectifier
Last Answer : Rectifier - This circuit convert AC signal into DC.
Description : Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it.
Last Answer : Circuit Diagram: Waveforms:
Description : i) State the significance of modulation index in AM transmission. ii) Explain the effect of modulation index on AM wave with waveforms.
Last Answer : Significance of modulation index in AM transmission It is used to determine the strength and quality of transmitted signal. If the modulation index is small, then the amount of variation in ... amplitude part of its information is lost in the process of modulation which is undesirable.
Description : Explain Center-tapped full wave rectifier with the help of circuit diagram and draw input output waveforms.
Last Answer : Operation : During positive half cycle of an AC supply, D1 will forward biased and current starts flowing through load. The output voltage is equal to +Vs. During negative half cycle of an AC ... output voltage is equal to +Vs. In this pulsating DC waveform will be obtained at the load.
Description : The mode theory uses electromagnetic wave behavior to describe the propagation of the light along the fiber. What is a set of guided electromagnetic waves called?
Last Answer : Modes of the fiber.
Description : If a wave's electric lines of force rotate through 360 degrees with every cycle of rf energy, what is the polarization of this wave?
Last Answer : Circular polarization.
Description : In a half wave rectifier the rms value of AC component of the waves (a) Zero (b) Equal to DC value (c) More than DC value (d) Less than DC value
Last Answer : b) Equal to DC value
Description : What is the resultant field strength at the receiving antenna in space wave propagation under case 2? A. 0 B. ξd C. 2ξd D. 3ξd
Last Answer : C. 2ξd
Description : The resultant electric field of a wave with Ex = 3 and Ey = 4 will be a) 7 b) 1 c) 25 d) 5
Last Answer : d) 5
Description : The resultant of a force acting on a body will be zero, if the body a.Rotates with uniform acceleration b.Moves along a curved path c.Rotates d.Does not rotate e.Rotates with uniform deceleration
Last Answer : d. Does not rotate
Description : When two concurrent and coplaner forces P and Q act at an angle of 180?, their resultant will be a a.moment equal to PQ b.couple c.(P-Q) d.107 dynes e.zero
Last Answer : c. (P-Q)
Description : Whether the resultant of two vectors of unequal magnitude be zero?
Last Answer : Whether the resultant of two vectors of unequal magnitude be zero?
Description : Define and explain the following terms: i. Zero vector (Null vector) ii. Resultant vector iii. Negative vectors iv. Equal vectors
Last Answer : Define and explain the following terms: i. Zero vector (Null vector) ii. Resultant vector ... vectors iv. Equal vectors v. Position vector
Description : It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because – (1) weights of buckets are balanced (2) centre of gravity falls within the body (3) centre of gravity and centre of equilibrium fall within the feet (4) resultant weight of buckets is zero
Last Answer : (3) centre of gravity and centre of equilibrium fall within the feet Explanation: When the buckets containing equal amount of water are held in both hands, weight is spaced out more evenly than it ... centre of gravity and the centre of equilibrium should fall, in the present case, within the feet.
Description : Minimum numbers of unequal vectors which can give zero resultant are - (1) Two (2) Three (3) Four (4) More than four
Last Answer : (2) three Explanation: Minimum number of unequal vectors which can give three zero resultants.
Description : Object is in equilibrium if resultant force acting on it is A. increasing B. decreasing C. zero D. becomes constant
Last Answer : zero
Description : The resultant motion of two Simple Harmonic Motions will be A. Simple Harmonic MotionB. Periodic Motion C. Projectile Motion D. Zero
Last Answer : A. Simple Harmonic Motion
Description : According to principle of moments (A) If a system of coplanar forces is in equilibrium, then their algebraic sum is zero (B) If a system of coplanar forces is in equilibrium, then the ... of their resultant about the same point (D) Positive and negative couples can be balanced
Last Answer : (C) The algebraic sum of the moments of any two forces about any point is equal to moment of their resultant about the same point
Description : If the resultant force acting on a body of constant mass is zero, the body's acceleration is: w) increasing x) decreasing y) always zero z) negative.
Last Answer : ANSWER: Y -- ALWAYS ZERO
Description : If the resultant force acting on a body of constant mass is zero, the body's momentum is: w) increasing x) decreasing y) always zero z) constant
Last Answer : ANSWER: Z -- CONSTANT
Description : It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because (1) weights of buckets are balanced (2) centre of gravity falls within the body (3) centre of gravity and centre of equilibrium fall within the feet (4) resultant weight of buckets is zero
Last Answer : centre of gravity and centre of equilibrium fall within the feet
Description : What is indicated by the number of arrows (closeness of spacing) used to represent an electric field?
Last Answer : The relative strength of the field.
Description : When you are using an ohmmeter to test a transistor for leakage, what is indicated by a low, but not shorted, reverse resistance reading?
Last Answer : A leaking transistor
Description : When you are testing the gain of an audio-frequency transistor with an ohmmeter, what is indicated by a 10-to-1 resistance ratio?
Last Answer : Normal gain.
Description : Which of the two synchro designation codes is indicated by 5DG on a synchro nameplate?
Last Answer : The Navy prestandard designation code.
Description : What is the largest count that can be indicated by a four stage counter?
Last Answer : 11112, or 1510.
Description : When checking a diode with an ohmmeter, what is indicated by two high resistance measurements?
Last Answer : The diode is open or has a high-forward resistance.
Description : The end of the usefulness of a tr tube is indicated by an increase in what quantity?
Last Answer : Recovery time.
Description : Refer to figure 3-55(A). If the following resistors were replaced with the values indicated: R1 = 900Ω, R3 = 1kΩ, what is the total power in the circuit? What is ER2?
Last Answer : PT = 60 W, ER2 = 10 V.
Description : How is an overload condition indicated by the electronic digital multimeter?
Last Answer : Simultaneous flashing of display readouts
Description : What type of frequency meter is shown and what is the value indicated for each meter in figure 1-52?
Last Answer : A) Vibrating-reed, 60Hz. (B) Moving-disk, 58 Hz.
Description : What value is indicated on the scale of an ac meter?
Last Answer : Effective value (rms).
Description : If the output of a circuit needs to be a complete representation of one-half of the input signal, what class of operation is indicated?
Last Answer : Class B operation.
Description : Choose the correct statement about use of βadrenergic blockers in CHF: A. All β blockers are equally effective in CHF B. They are used as alternative to conventional therapy with ... dysfunction due to dilated cardiomyopathy D. They are indicated only in asymptomatic left ventricular dysfunction
Last Answer : C. They are most useful in mild to moderate cases with systolic dysfunction due to dilated cardiomyopathy
Description : An open coil in a transformer will be indicated by which of the listed conditions? A. 'zero' resistance accompanied by high inductance B. no resistance accompanied by stray inductance C. infinite resistance in addition to no inductance D. infinite resistance in addition to normal inductance
Last Answer : Answer: C
Description : When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by the megohmmeter pointer _____________. A. fluctuating around a ... slightly downscale as voltage is applied D. continually rising as the test voltage is applied