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

The closed loop gain of the non-inverting amplifier is given by

Question # 2

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

Question # 3

The waveform of alternating voltage is a:

Question # 4

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

Question # 5

When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency

Question # 6

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

Question # 7

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 # 8

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

Question # 9

Alternating current is produced by a voltage source which polarity:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The Instantaneous value of alternative current maybe:

Question # 15

The bridge circuit of full wave rectification uses

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
2 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
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 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
5 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
6 A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at
A. inverting input
B. non-inverting input
C. any one of the input terminal
D. none of them
7 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
8 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
9 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°
10 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

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