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

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

Question # 2

A diode characteristic curve is a plot between

Question # 3

At resonance frequency the impedance of parallel resonance circuit is

Question # 4

The magnitude of alternative voltage V:

Question # 5

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 6

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

Question # 7

Which one of the following is correct?

Question # 8

At resonance, the impedance of RLC series circuit is

Question # 9

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

Question # 10

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 11

The alternative voltage of current is actually measured by:

Question # 12

When the p-n junction is forward biased its resistance is of the order of

Question # 13

Electromagnetic waves transmit energy equal to

Question # 14

The phase at the positive peak of an A.C. cycle is:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
2 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
3 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
4 To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance
A. 5.07 pF
B. 50 pF
C. 0.507 pF
D. 507 pF
5 In describing functions of digital systems, a closed switch will be shown as
A. 0
B. 1
C. low
D. any one of these
6 In which of the following components, pn-junction is used
A. light emitting diode
B. photo diode
C. photo voltaic cell
D. all of these
7 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
8 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
9 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
10 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

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