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 phase at the positive peak of an A.C. cycle is:

Question # 2

In frequency modulation (FM), the carrier waves amplitude

Question # 3

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

Question # 4

The bridge circuit of full wave rectification uses

Question # 5

In RLC series circuit, resonance occurs when

Question # 6

Which one of the following is correct?

Question # 7

At resonance, the phase angle for RLC series resonance circuit equals

Question # 8

For the normal operation of the transistor, its

Question # 9

Average value of A.C voltage during one cycle is

Question # 10

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 11

Chock consumes externally small

Question # 12

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

Question # 13

Which one of the following waves belongs to electromagnetic spectrum

Question # 14

The value of output resistance of OP-AMOP is of the order of

Question # 15

The RMS value of alternating current is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is
A. 3525.0 volts
B. 35.35 volts
C. 353.5 volts
D. 3.535 volts
3 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
4 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
5 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)
6 A p-n junction is formed when a crystal of silicon is growth in such a way that its one half is doped with trivalent impurity and the other half with a impurity from
A. 2nd group
B. fourth group
C. fifth group
D. sixth group
7 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
8 The device which allows only the flow of an A.C. through a circuit is
A. Capacitor
B. Inductor
C. D.C. motor
D. Battery
9 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
10 Alternating current can induce voltage because it has a
A. High peak value
B. Varying magnetic field
C. Stronger field than direct curren
D. Constant magnetic field

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