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

In describing functions of digital systems, a closed switch will be shown as

Question # 2

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 3

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 4

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 5

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 6

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

Question # 7

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

Question # 8

During each cycle, alternating voltage reaches a peak value

Question # 9

In half wave rectification

Question # 10

In which of the following components, pn-junction is used

Question # 11

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 12

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

Question # 13

Average value of A.C voltage during one cycle is

Question # 14

The RMS value of alternating current is:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 For a n-p-n transistor, the conventional current equation can be written as
A. IE+ IC= IB
B. IC- IB= IE
C. IC+ IB= IE
D. IB+ IE= IC
2 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
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 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
5 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)
6 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
7 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
8 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
9 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
10 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above

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