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

Conversion of alternating current into direct current is called

Question # 2

Chock consumes externally small

Question # 3

In which of the following components, pn-junction is used

Question # 4

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

Question # 5

The basic circuit element in A.C. circuits are:

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Alternating current is produced by a voltage source which polarity:

Question # 10

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 11

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

Question # 12

At resonance frequency the impedance of parallel resonance circuit is

Question # 13

OP-AMP has the following input terminals

Question # 14

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

Question # 15

The open loop gain of OP-AMP is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
2 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
3 The value of current gain of n-p-n transistor is of the order of
A. tens
B. hundreds
C. thousands
D. ten thousands
4 The bridge circuit of full wave rectification uses
A. one diode
B. two diode
C. three diode
D. four diode
5 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
6 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
7 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
8 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
9 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
10 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these

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