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 output voltage of half wave rectification is in the form of

Question # 2

In RLC series circuit, resonance occurs when

Question # 3

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

Question # 4

A changing magnetic flux creates around itself

Question # 5

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 6

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

Question # 7

The magnitude of alternative voltage V:

Question # 8

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 9

At resonance, the phase angle for RLC series resonance circuit equals

Question # 10

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 11

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

Question # 12

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

Question # 13

The highest value reached by the voltage or current:

Question # 14

In free space, the speed of electromagnetic waves is

Question # 15

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
2 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
3 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
4 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
5 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
6 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
7 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
8 The basic circuit element in A.C. circuits are:
A. Resistor and capacitor
B. Resistor and Inductor
C. Capacitor only
D. Both (B) and (C)
9 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
10 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant

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