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

For the normal operation of the transistor, its

Question # 2

When the emitter-base junction of a transistor is reverse biased, collector current

Question # 3

A digital system deals with quantities or variables which have

Question # 4

Transmitting antenna emits

Question # 5

An A.C varies as a function of

Question # 6

Which of the following has a great concentration of impurity

Question # 7

Conversion of alternating current into direct current is called

Question # 8

The basic circuit element in D.C. circuit is:

Question # 9

Which one of the following waves belongs to electromagnetic spectrum

Question # 10

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

Question # 11

The highest value reached by the voltage or current:

Question # 12

In frequency modulation (FM), the carrier waves amplitude

Question # 13

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

Question # 14

The circuit which is used to smooth the output voltage of the full-wave rectification is known as

Question # 15

The waveform of alternating voltage is a:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The value of the potential difference across the depletion region for the case of germanium is
A. 0.3 V
B. 0.5 V
C. 0.7 V
D. 0.9 V
2 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
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 The r.m.s. value of alternating current is equal to its maximum value at angle of
A. 60°
B. 45°
C. 30°
D. 90°
5 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms
6 For normal operation of transistor, the batteries
A. VCCis of much lower value than VBB
B. VCCis of much higher value than VBB
C. VCC is equal toVBB
D. none of these
7 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
8 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
9 During each cycle, alternating voltage reaches a peak value
A. One time
B. Two times
C. Four times
D. A number of times depending on the frequency
10 A changing magnetic flux creates around itself
A. An electromotive force
B. An electric field (changing electric flux)
C. Magnetic field
D. None of the above

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