ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics Chapter 16 Alternating Current

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Question # 1

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

Question # 2

The most common source of alternating voltage is:

Question # 3

At resonance, the impedance of RLC series circuit is

Question # 4

The magnitude of alternative voltage V:

Question # 5

The input resistance of the OP-AMP is the resistance between the

Question # 6

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

Question # 7

The waveform of alternating voltage is a:

Question # 8

In free space, the speed of electromagnetic waves is

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

Electromagnetic waves transmit energy equal to

Question # 13

The Instantaneous value of alternative current maybe:

Question # 14

The length of rotating vector (on a certain scale) represents the:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The basic circuit elements of A.C circuit are
A. Resistor
B. Inductor
C. Capacitor
D. All the three
2 The alternative voltage of current is actually measured by:
A. Its RMS value
B. Square root of its mean square value
C. Instantaneous value
D. Peak value
3 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
4 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
5 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
6 The total reactance of a series RLC circuit at resonance is
A. zero
B. Equal to the resistance
C. Infinity
D. Capacitive
7 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
8 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)
9 The closed loop gain of the inverting amplifier is written as
A. G = R2/R1
B. G = 1 + R2/R1
C. G = -R2/R1
D. G = 1 - R2/R1
10 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them

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