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

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 2

The basic circuit elements of A.C circuit are

Question # 3

A diode characteristic curve is a plot between

Question # 4

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

Question # 5

The most common source of alternating voltage is:

Question # 6

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 7

A changing magnetic flux creates around itself

Question # 8

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

Question # 9

Which of the following diodes can operate in the reverse biased condition

Question # 10

The input resistance of the OP-AMP is the resistance between the

Question # 11

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

Question # 12

The value of current gain of n-p-n transistor is of the order of

Question # 13

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

Question # 14

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

Question # 15

Chock consumes externally small

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
2 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
3 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
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 A sinusoidally alternating voltage or current can be graphically represented by a:
A. Vector
B. Rotating vector
C. Clockwise vector
D. Anticlockwise voltage vector
6 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
7 A digital system deals with quantities or variables which have
A. only one state
B. only two discrete states
C. three discrete states
D. four discrete states
8 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
9 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
10 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1

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