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

Which of the following has a great concentration of impurity

Question # 2

The bridge circuit of full wave rectification uses

Question # 3

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

Question # 4

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

Question # 5

The Instantaneous value of alternative current maybe:

Question # 6

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

Question # 7

For the normal operation of the transistor, its

Question # 8

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

Question # 9

A P-N juction or semiconductor diode cannot be used as

Question # 10

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 11

Average value of A.C voltage during one cycle is

Question # 12

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

Question # 13

The RMS value of alternating current is:

Question # 14

At resonance, the impedance of RLC series circuit is

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
2 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
3 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
4 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
5 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
6 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
7 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
8 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
9 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
10 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

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