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

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

Question # 2

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 3

The impedance of RLC series resonance circuit at resonant frequency is

Question # 4

The value of the potential difference across the depletion region for the case of germanium is

Question # 5

OP-AMP has the following input terminals

Question # 6

The basic circuit elements of A.C circuit are

Question # 7

The sum of positive and negative peak values is called:

Question # 8

For the normal operation of the transistor, its

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

In a transistor, if the central region is n-type, then this type of transistor is known as

Question # 11

In free space, the speed of electromagnetic waves is

Question # 12

The waveform of alternating voltage is a:

Question # 13

The bridge circuit of full wave rectification uses

Question # 14

Alternating current can induce voltage because it has a

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 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
2 In a transistor, if the central region is n-type, then this type of transistor is known as
A. n-p-n transistor
B. p-n-p transistor
C. either of these
D. none of these
3 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
4 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
5 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
6 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
7 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
8 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
9 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
10 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
D. none of these

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