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

For the normal operation of the transistor, its

Question # 2

Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:

Question # 3

An A.C. voltmeter read 250 volts. The frequency of alternating is 50 Hz, the peak value of voltage is

Question # 4

Which one of the following is correct?

Question # 5

The closed loop gain of the non-inverting amplifier is given by

Question # 6

Transmitting antenna emits

Question # 7

In frequency modulation (FM), the carrier waves amplitude

Question # 8

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

Question # 9

The total reactance of a series RLC circuit at resonance is

Question # 10

The bridge circuit of full wave rectification uses

Question # 11

The waveform of alternating voltage is a:

Question # 12

A changing magnetic flux creates around itself

Question # 13

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

Question # 14

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

Question # 15

Which of the following diode is used for the detection of light

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Alternating current is produced by a voltage source which polarity:
A. Remains the same
B. Reverse after period T
C. Keeps on reversing with time
D. Reverse after every time interval T/2
2 During the positive half-cycle in the half-wave rectification,the diode
A. does not conduct
B. conducts
C. either of these
D. neither of these
3 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
4 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
5 When the pn-junction is forward biased. the current flows through it is of the order of
A. mili-amperes
B. amperes
C. nano-amperes
D. micro-amperes
6 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
7 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
8 The entire wave form of sinusoidal voltage is actually a set of all the:
A. Positive maximum value + Voand negative maximum value -Vo
B. Posiotive maximum value +Vo and zero
C. Zero and negative maximum value -Vo
D. Any of these
9 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
10 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)

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