ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

The output voltage of half wave rectification is in the form of

Question # 2

Transmitting antenna emits

Question # 3

In series RC circuit when R=Xc, then the phase angle is

Question # 4

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 5

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 6

Which one of the following is correct?

Question # 7

The device which allows only the flow of an A.C. through a circuit is

Question # 8

The total reactance of a series RLC circuit at resonance is

Question # 9

The phase angle of a series RLC circuit at resonance is

Question # 10

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 11

The amplifier which us used to perform mathematical operations electronically is known as

Question # 12

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 13

In a transistor, if the central region is p-type then this type of transistor is known as

Question # 14

The basic circuit element in D.C. circuit is:

Question # 15

A P-N juction or semiconductor diode cannot be used as

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
2 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
3 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
4 An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current
A. Decreases
B. Increases
C. Does not change
D. Momentarily goes to zero
5 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
6 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
7 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
8 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
9 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
10 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them

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