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

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 2

The magnitude of alternative voltage V:

Question # 3

The power factor of resonant series circuit is

Question # 4

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 5

During the negative half-cycle of the half-wave rectification, the diode

Question # 6

At resonance frequency the impedance of parallel resonance circuit is

Question # 7

A P-N juction or semiconductor diode cannot be used as

Question # 8

For normal operation of transistor, the batteries

Question # 9

The value of the input resistance of OP-AMP is of the order of

Question # 10

The closed loop gain of the inverting amplifier is written as

Question # 11

Conversion of alternating current into direct current is called

Question # 12

The alternative voltage of current is actually measured by:

Question # 13

A diode characteristic curve is a plot between

Question # 14

Alternating current can induce voltage because it has a

Question # 15

Chock consumes externally small

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field
3 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
4 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°
5 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
6 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all 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 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
9 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (C)
10 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

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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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