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

Nowadays, Most of the electric energy is produced by the A.C. generators using:

Question # 2

The basic circuit elements of A.C circuit are

Question # 3

When the pn-junction is in reversed biased, current flows through the junction due to the

Question # 4

The impedance of RLC series resonance circuit at resonant frequency is

Question # 5

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

Question # 6

Conversion of alternating current into direct current is called

Question # 7

The bridge circuit of full wave rectification uses

Question # 8

Which one of the following is correct?

Question # 9

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

Question # 10

For a n-p-n transistor, the conventional current equation can be written as

Question # 11

During the negative half-cycle of the half-wave rectification, the diode

Question # 12

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

Question # 13

A changing magnetic flux creates around itself

Question # 14

If 250V is the RMS value of alternative voltage, then its peak value Vowill be:

Question # 15

SI unit of impedance is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The amplifier which us used to perform mathematical operations electronically is known as
A. calculator
B. OP-AMP
C. computer
D. any one of them
2 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
3 A resonance curve for RLC series circuit is a plot of frequency versus
A. Voltage
B. Current
C. Impedance
D. Reactance
4 Conversion of alternating current into direct current is called
A. amplification
B. rectification
C. conduction
D. polarization
5 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
6 The time interval during which the Voltage source changes its polarity once is known as:
A. Time period T
B. Half the time period
C. Quarter the time period
D. Two third of the time period
7 During the negative half-cycle of the half-wave rectification, the diode
A. does not conduct
B. conducts
C. either of these
D. none of these
8 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
9 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
10 The Instantaneous value of alternative current maybe:
A. The same as its RMS value
B. Greater than its Rms value
C. The same as its peak value
D. Any of these

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