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 phase angle of a series RLC circuit at resonance is

Question # 2

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

Question # 3

Transmitting antenna emits

Question # 4

Chock consumes externally small

Question # 5

Which one of the following waves belongs to electromagnetic spectrum

Question # 6

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 7

The highest value reached by the voltage or current:

Question # 8

The sum of positive and negative peak values is called:

Question # 9

SI unit of impedance is

Question # 10

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

Question # 11

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

Question # 12

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 13

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

Question # 14

Average value of A.C voltage during one cycle is

Question # 15

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

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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 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
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 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these
5 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
6 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
7 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
8 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
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 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs

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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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