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 total reactance of a series RLC circuit at resonance is

Question # 2

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

Question # 3

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

Question # 4

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 5

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

Question # 6

The device which allows only the flow of an A.C. through a circuit is

Question # 7

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

Question # 8

The R1= infinity and R2= 0, then the gain of non-inverting amplifier is

Question # 9

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

Question # 10

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 11

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 12

A resonance curve for RLC series circuit is a plot of frequency versus

Question # 13

At resonance, the impedance of RLC series circuit is

Question # 14

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 15

The phase angle of a series RLC circuit at resonance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
3 When the pn-junction is in reversed biased, current flows through the junction due to the
A. majority carriers
B. minority carriers
C. either of them
D. none of them
4 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
5 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
6 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
7 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
8 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
9 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
10 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)

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