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

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

Question # 2

The basic circuit elements of A.C circuit are

Question # 3

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

Question # 4

In free space, the speed of electromagnetic waves is

Question # 5

The power factor of resonant series circuit is

Question # 6

Average value of A.C voltage during one cycle is

Question # 7

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 8

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

Question # 9

The amplifier which us used to perform mathematical operations electronically is known as

Question # 10

The closed loop gain of the inverting amplifier is written as

Question # 11

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

Question # 12

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 13

In half wave rectification

Question # 14

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

Question # 15

The phase at the positive peak of an A.C. cycle 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 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
3 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
4 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
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 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
7 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases
8 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
9 Which of the following diode is used for the detection of light
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
10 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

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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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