ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

The power factor of resonant series circuit is

Question # 2

During the negative half-cycle of the half-wave rectification, the diode

Question # 3

A digital system deals with quantities or variables which have

Question # 4

The phase angle of a series RLC circuit at resonance is

Question # 5

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

Question # 6

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

Question # 7

The sum of positive and negative peak values is called:

Question # 8

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

Question # 9

SI unit of impedance is

Question # 10

The highest value reached by the voltage or current:

Question # 11

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 12

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 13

Average value of A.C voltage during one cycle is

Question # 14

The phase at the positive peak of an A.C. cycle is:

Question # 15

In half wave rectification

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
3 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
4 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
5 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
6 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
7 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
8 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)
9 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
10 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

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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