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

For the normal operation of the transistor, its

Question # 2

The waveform of alternating voltage is a:

Question # 3

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

Question # 4

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 5

The input resistance of the OP-AMP is the resistance between the

Question # 6

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 7

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

Question # 8

Alternating current is produced by a voltage source which polarity:

Question # 9

An A.C varies as a function of

Question # 10

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

Question # 11

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 12

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

Question # 13

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 14

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

Question # 15

The phase angle of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
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 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
4 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
5 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
6 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
7 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
8 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
9 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
10 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

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