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

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

Question # 2

The value of current gain of n-p-n transistor is of the order of

Question # 3

An A.C varies as a function of

Question # 4

The sum of positive and negative peak values is called:

Question # 5

The magnitude of alternative voltage V:

Question # 6

In RLC series circuit, resonance occurs when

Question # 7

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

Question # 8

The basic circuit element in A.C. circuits are:

Question # 9

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

Question # 10

Transmitting antenna emits

Question # 11

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

Question # 12

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

Question # 13

If the value of C in a series RLC circuit is increased, the resonant frequency

Question # 14

The most common source of alternating voltage is:

Question # 15

Due to the high value of the input resistance, practically, the value of the current which flows between the input terminals is

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 In an A.C circuit with resistor only, the current and voltage have a phase angle of
A. 90°
B. 0°
C. 180°
D. none of these
3 OP-AMP has the following input terminals
A. one
B. two
C. three
D. four
4 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
5 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
6 In a transistor, the central region is called
A. collector
B. emitter
C. base
D. none of them
7 Peak value of alternative current is:
A. one of its Instantaneous value
B. Equal to its RMS value
C. The same as its peak-to-peak value
D. Both (B) and (C)
8 At higher frequency of the alternating current, the capacitive reactance Xc
A. Increases
B. Decreases
C. Remains the same
D. Increases only when the voltage increases
9 Mathematical manipulation of the two quantized states can be best carried if they are represented by
A. high - low
B. yes - no
C. on - off
D. 0 - 1
10 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential

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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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