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

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 2

At resonance frequency the impedance of parallel resonance circuit is

Question # 3

Chock consumes externally small

Question # 4

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

Question # 5

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 6

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 7

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 8

The length of rotating vector (on a certain scale) represents the:

Question # 9

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

Question # 10

Most OP-AMP operates with

Question # 11

Average value of A.C voltage during one cycle is

Question # 12

In which of the following components, pn-junction is used

Question # 13

The average of A.C. current and voltage over a complete cycle is

Question # 14

The open loop gain of OP-AMP is of the order of

Question # 15

Nowadays, Most of the electric energy is produced by the A.C. generators using:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
3 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
4 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
5 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these
6 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
7 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
8 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
9 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
10 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these

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