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

At resonance, the impedance of RLC series circuit is

Question # 2

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

Question # 3

The entire wave form of sinusoidal voltage is actually a set of all the:

Question # 4

During each cycle, alternating voltage reaches a peak value

Question # 5

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

Question # 6

The r.m.s. value of alternating current is equal to its maximum value at angle of

Question # 7

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

Question # 8

Which of the following diode is used to derive the current in external circuit when light is incident in the circuit

Question # 9

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

Question # 10

The wave form of alternating voltage is the graph between:

Question # 11

The total reactance of a series RLC circuit at resonance is

Question # 12

The waveform of alternating voltage is a:

Question # 13

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

Question # 14

Which one of the following waves belongs to electromagnetic spectrum

Question # 15

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

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean:
A. Peak value
B. RMS value
C. Instantaneous value
D. Peak-to-peak value
2 The R1= infinity and R2= 0, then the gain of non-inverting amplifier is
A. zero
B. infinity
C. one
D. any one of these
3 SI unit of impedance is
A. hertz
B. henry
C. ampere
D. ohms
4 Which one of the following is correct?
A. Vo= 1.414 Vrms
B. Iams= 1.414 Io
C. VO = 10.70 Vrms
D. Both a and b
5 The magnitude of alternative voltage V:
A. Always increase
B. Always decrease
C. Remains constant
D. Does not remain constant
6 The open loop gain of OP-AMP is of the order of
A. 102
B. 103
C. 104
D. 105
7 In which of the following diodes when an electron combines with a hole during the forward biasing, photon of visible light is emitted.
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. all of them
8 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
9 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
10 The most common source of alternating voltage is:
A. Motor
B. Transformer
C. AC genrator
D. Both (A) and (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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