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 basic circuit element in A.C. circuits are:

Question # 2

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

Question # 3

A signal is amplified at the output without any change of phase, if it is applied at the

Question # 4

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

Question # 5

The impedance of RLC series resonance circuit at resonant frequency is

Question # 6

In half wave rectification

Question # 7

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

Question # 8

When the p-n junction is forward biased its resistance is of the order of

Question # 9

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

Question # 10

The most common source of alternating voltage is:

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

The length of rotating vector (on a certain scale) represents the:

Question # 15

The Instantaneous value of alternative current maybe:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
2 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
3 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
4 For the normal operation of the transistor, its
A. emitter-base and collector base junctions are forward biased
B. emitter-base junction is reversed biased and collector base junction is forward biased
C. emitter-base junction is forward biased and collector-base junction is reverse biased
D. any one of these
5 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
6 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
7 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
8 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
9 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
10 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current

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