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

Mathematical manipulation of the two quantized states can be best carried if they are represented by

Question # 2

When the pn-junction is forward biased. the current flows through it is of the order of

Question # 3

The alternative voltage of current is actually measured by:

Question # 4

The value of the input resistance of OP-AMP is of the order of

Question # 5

A diode characteristic curve is a plot between

Question # 6

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

Question # 7

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

Question # 8

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

Question # 9

The open loop gain of OP-AMP is of the order of

Question # 10

In a transistor, the central region is called

Question # 11

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

Question # 12

When the p-n junction is forward biased its resistance is of the order of

Question # 13

A changing magnetic flux creates around itself

Question # 14

The sum of positive and negative peak values is called:

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The RMS value of alternating current is:
A. 0.7 times at the peak value
B. 0.5 times the peak value
C. 0.7 times the Instantaneous value
D. Equal to maximum voltage
2 In frequency modulation (FM), the carrier waves amplitude
A. Remains constant
B. Increase
C. Decreases
D. None of these
3 The power factor of resonant series circuit is
A. 1
B. 0
C. -1
D. 0.5
4 The highest value reached by the voltage or current:
A. In quarter cycle is called Instantaneous value
B. In half cycle is called peak-to-peak value
C. In one cycle is called peak value
D. In half cycle is called Instantaneous value
5 The phase angle of a series RLC circuit at resonance is
A. 180°
B. 90°
C. 0°
D. None of the these
6 Transmitting antenna emits
A. Magnetic waves
B. Electric waves
C. Electromagnetic waves
D. Sound waves
7 Alternating current can be transmitted:
A. To long distance
B. At very high cost
C. At very low cost
D. Both (A) and (C)
8 Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is
A. zero
B. small
C. large
D. very large
9 In half wave rectification
A. both halves of the input voltage is used
B. only one half of the input voltage is used
C. either of these
D. none of these
10 If we connected the ordinary DC ammeter to measure alternating current, it would measure its:
A. Instantaneous value
B. RMS value
C. Value averaged over a cycle
D. Either (B) or (C)

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  • Iiqra Fatima

    Iiqra Fatima

    25 May 2018

    You should let us practice difficult mcqs ..These are too easy for ECAT level....Thanku

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