ECAT Pre Computer Science Chapter 16 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 16 Alternating Current

Try The MCQ's Test For ECAT Physics Chapter 16 Alternating Current

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ECAT Physics 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

In n-p-n transistor, emitter base junction is kept

Question # 3

Alternating current can be transmitted:

Question # 4

The phase angle of a series RLC circuit at resonance is

Question # 5

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

Question # 6

In which of the following components, pn-junction is used

Question # 7

In describing functions of digital systems, a closed switch will be shown as

Question # 8

In half wave rectification

Question # 9

Transmitting antenna emits

Question # 10

In series RC circuit when R=Xc, then the phase angle is

Question # 11

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

Question # 12

In free space, the speed of electromagnetic waves is

Question # 13

An A.C varies as a function of

Question # 14

The device which allows only the flow of an A.C. through a circuit is

Question # 15

During each cycle, alternating voltage reaches a peak value

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops
2 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
3 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
4 When the pn-junction is connected reversed biased, its resistance is of the order of
A. few ohms
B. few kilo-ohms
C. few mega-ohms
D. few mili-ohms
5 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
6 Which of the following has a great concentration of impurity
A. base
B. emitter
C. collector
D. none of these
7 At resonance, the impedance of RLC series circuit is
A. Maximum
B. Zero
C. Minimum
D. Determinate
8 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
9 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
10 If the value of C in a series RLC circuit is increased, the resonant frequency
A. Is not affected
B. Increase
C. Remains the same
D. Decreases

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