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

Which one of the following waves belongs to electromagnetic spectrum

Question # 2

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

Question # 3

A sinusoidally alternating voltage or current can be graphically represented by a:

Question # 4

Alternating current can induce voltage because it has a

Question # 5

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

Question # 6

The input resistance of the OP-AMP is the resistance between the

Question # 7

In free space, the speed of electromagnetic waves is

Question # 8

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

Question # 9

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

Question # 10

During each cycle, alternating voltage reaches a peak value

Question # 11

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

Question # 12

The output voltage of half wave rectification is in the form of

Question # 13

Peak value of alternative current is:

Question # 14

During the negative half-cycle of the half-wave rectification, the diode

Question # 15

The RMS value of alternating current is:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The basic circuit element in D.C. circuit is:
A. A capacitor
B. A resistor
C. An inductor
D. Both (A) and (C)
2 The closed loop gain of the non-inverting amplifier is given by
A. G = R2/R1
B. G = -R2/R1
C. G = 1 - R2/R1
D. G = 1 + T2/R1
3 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)
4 In RLC series circuit, resonance occurs when
A. XL > Xc
B. XL < Xc
C. XL = Xc
D. None of these
5 The phase at the positive peak of an A.C. cycle is:
A. 0º

B. 90º

C. 180º

D. 0 andᏘ
6 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
7 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
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 Which of the following diodes can operate in the reverse biased condition
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
10 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

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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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