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

Question # 2

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 3

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 4

SI unit of impedance is

Question # 5

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

Question # 6

The value of the potential difference across the depletion region for the case of germanium is

Question # 7

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

Question # 8

In RLC series circuit, resonance occurs when

Question # 9

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

Question # 10

The value of output resistance of OP-AMOP is of the order of

Question # 11

In n-p-n transistor, emitter base junction is kept

Question # 12

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

Question # 13

The power factor of resonant series circuit is

Question # 14

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 15

Which one of the following is correct?

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
2 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
3 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
4 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
5 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
6 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
7 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
8 When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
9 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
10 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these

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