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

The bridge circuit of full wave rectification uses

Question # 2

The basic circuit elements of A.C circuit are

Question # 3

Chock consumes externally small

Question # 4

In an A.C circuit with resistor only, the current and voltage have a phase angle of

Question # 5

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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

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

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 12

During the positive half-cycle in the half-wave rectification,the diode

Question # 13

Which one of the following is correct?

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
3 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
4 When a transistor is used as a switch the circuit in which the current is to be switched OFF and ON, is connected between the
A. base and emitter
B. collector and emitter
C. base and collector
D. any one of these
5 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
6 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
7 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
8 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
9 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
10 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these

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