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

In RLC series circuit, resonance occurs when

Question # 2

An A.C. voltage is applied across the inductor. When the frequency of the voltage is increased, the current

Question # 3

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

Question # 4

For the normal operation of the transistor, its

Question # 5

Alternating current is produced by a voltage source which polarity:

Question # 6

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

Question # 7

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

Question # 8

In free space, the speed of electromagnetic waves is

Question # 9

The bridge circuit of full wave rectification uses

Question # 10

In n-p-n transistor, emitter base junction is kept

Question # 11

SI unit of impedance is

Question # 12

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 13

In frequency modulation (FM), the carrier waves amplitude

Question # 14

The waveform of alternating voltage is a:

Question # 15

The value of current gain of n-p-n transistor is of the order of

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The waveform of alternating voltage is a:
A. Square
B. Rectangular
C. Saw-tooth
D. Sinusoidal
2 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
3 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
4 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
5 The circuit which is used to smooth the output voltage of the full-wave rectification is known as
A. transformer
B. rectifier
C. filter
D. none of these
6 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
7 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
8 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
9 In a normally biased n-p-n transistor, an electron c current IEflows from the
A. emitter into the base
B. collector into the base
C. base into collector
D. none of these
10 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

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