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

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

Question # 2

In half wave rectification

Question # 3

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

Question # 4

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

Question # 5

The impedance of RLC series resonance circuit at resonant frequency is

Question # 6

Chock consumes externally small

Question # 7

Most OP-AMP operates with

Question # 8

OP-AMP has the following input terminals

Question # 9

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

Question # 10

In frequency modulation (FM), the carrier waves amplitude

Question # 11

In n-p-n transistor, emitter base junction is kept

Question # 12

The power factor of resonant series circuit is

Question # 13

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

Question # 14

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

Question # 15

The most common source of alternating voltage is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The average of A.C. current and voltage over a complete cycle is
A. Maximum
B. zero
C. Neither zero nor maximum
D. None of these
4 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
5 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
6 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
7 A P-N juction or semiconductor diode cannot be used as
A. A rectifier
B. Detector
C. Oscillator
D. An amplifier
8 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
9 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
10 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105

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