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

The wave form of alternating voltage is the graph between:

Question # 2

The waveform of alternating voltage is a:

Question # 3

At resonance, the impedance of RLC series circuit is

Question # 4

The most common source of alternating voltage is:

Question # 5

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

Question # 6

The value of output resistance of OP-AMOP is of the order of

Question # 7

An A.C varies as a function of

Question # 8

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

Question # 9

Average value of A.C voltage during one cycle is

Question # 10

Which one of the following Electro-magnetic wave have the highest frequency and shortest wave-length

Question # 11

When the pn-junction is connected reversed biased, its resistance is of the order of

Question # 12

During each cycle, alternating voltage reaches a peak value

Question # 13

The emitter-base junction of a transistor is forward-biased and collector-base junction is reverse-biased. If the base current is increased, its

Question # 14

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

Question # 15

SI unit of impedance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
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 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
4 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
5 Most OP-AMP operates with
A. + 6 V supply
B. + 10 V supply
C. + 12 V supply
D. + 24 V supply
6 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
7 Nowadays, Most of the electric energy is produced by the A.C. generators using:
A. Hydal water
B. Geothermal energy
C. Solar energy
D. Biomass
8 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
9 If we connect a A.C. volt meter to read A.C. voltage, It would read its:
A. RMS value
B. Instantaneous value
C. Valued average over a cycle
D. Zero
10 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

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