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

The total reactance of a series RLC circuit at resonance is

Question # 2

Peak value of alternative current is:

Question # 3

Alternating current can be transmitted:

Question # 4

The average of A.C. current and voltage over a complete cycle is

Question # 5

The Instantaneous value of alternative current maybe:

Question # 6

In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.

Question # 7

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

Question # 8

A signal appears after amplification, at the output terminal with a phase shift of 180° , if it is applied at

Question # 9

In free space, the speed of electromagnetic waves is

Question # 10

Transmitting antenna emits

Question # 11

In a normally biased n-p-n transistor, an electron c current IEflows from the

Question # 12

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 # 13

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

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 In n-p-n transistor, emitter base junction is kept
A. reversed
B. forward biased
C. may be reversed or may be forward biased
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 If 250V is the RMS value of alternative voltage, then its peak value Vowill be:
A. 353.5V
B. 250V
C. 175V
D. zero
4 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
5 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
6 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
7 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
8 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
9 At resonance, the phase angle for RLC series resonance circuit equals
A. 0°
B. 90°
C. 180°
D. 270°
10 A signal is amplified at the output without any change of phase, if it is applied at the
A. inverting input
B. non-inverting input
C. at any of the input
D. none of these

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