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

At resonance frequency the impedance of parallel resonance circuit is

Question # 2

The basic circuit element in A.C. circuits are:

Question # 3

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

Question # 4

In free space, the speed of electromagnetic waves is

Question # 5

Electromagnetic waves transmit energy equal to

Question # 6

If we connect a A.C. volt meter to read A.C. voltage, It would read its:

Question # 7

The bridge circuit of full wave rectification uses

Question # 8

The RMS value of alternating current is:

Question # 9

The amplifier which us used to perform mathematical operations electronically is known as

Question # 10

In RLC series circuit, resonance occurs when

Question # 11

Average value of A.C voltage during one cycle is

Question # 12

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

Question # 13

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 14

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

Question # 15

The time interval during which the Voltage source changes its polarity once is known as:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
4 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
5 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
6 At resonance frequency the impedance of parallel resonance circuit is
A. Maximum
B. Minimum
C. Zero
D. None of the above
7 Electromagnetic waves transmit energy equal to
A. 1/2 mv2
B. moc2
C. hf/c
D. hf
8 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
9 In a transistor, if the central region is p-type then this type of transistor is known as
A. p-n-p transistor
B. n-p-n transistor
C. either of these
D. none of these
10 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

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