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

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 2

The power factor of resonant series circuit is

Question # 3

In frequency modulation (FM), the carrier waves amplitude

Question # 4

Which one of the following is correct?

Question # 5

OP-AMP has the following input terminals

Question # 6

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

Question # 7

A changing magnetic flux creates around itself

Question # 8

In half wave rectification

Question # 9

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

Question # 10

The bridge circuit of full wave rectification uses

Question # 11

The value of current gain of n-p-n transistor is of the order of

Question # 12

Which one of the following waves belongs to electromagnetic spectrum

Question # 13

When either L or C is increased, the resonant frequency of the RLC series circuit

Question # 14

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
2 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one 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 value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
5 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
6 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
7 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
8 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
9 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
10 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above

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