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 Instantaneous value of alternative current maybe:

Question # 2

In free space, the speed of electromagnetic waves is

Question # 3

The magnitude of alternative voltage V:

Question # 4

Which of the following diodes can operate in the reverse biased condition

Question # 5

The sum of positive and negative peak values is called:

Question # 6

The time interval during which the Voltage source changes its polarity once is known as:

Question # 7

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

Question # 8

The value of output resistance of OP-AMOP is of the order of

Question # 9

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

Question # 10

In describing functions of digital systems, a closed switch will be shown as

Question # 11

To design a resonant circuit of frequency 100 KHz with an inductor of inductance 5 mH, we need a capacitor of capacitance

Question # 12

At higher frequency of the alternating current, the capacitive reactance Xc

Question # 13

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

Question # 14

The basic circuit element in D.C. circuit is:

Question # 15

The highest value reached by the voltage or current:

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 The output voltage of half wave rectification is in the form of
A. a smooth curve
B. a smooth wave
C. pulses
D. all of the above
2 The value of the input resistance of OP-AMP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several maga ohms
3 When either L or C is increased, the resonant frequency of the RLC series circuit
A. Increases
B. Decreases
C. Remains the same
D. Becomes zero
4 Chock consumes externally small
A. Charge
B. Current
C. Power
D. Potential
5 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
6 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
7 Which of the following diode is used to derive the current in external circuit when light is incident in the circuit
A. photo diode
B. light emitting diode
C. photo voltaic cell
D. none of these
8 The length of rotating vector (on a certain scale) represents the:
A. Peak value of alternating quantity
B. RMS value of alternating quantity
C. Instantaneous value of alternating quantity
D. Either (B) or (C)
9 The input resistance of the OP-AMP is the resistance between the
A. (-) input and output
B. (+) input and output
C. (-) and (+) inputs
D. between any inputs
10 The value of output resistance of OP-AMOP is of the order of
A. few ohms
B. few hundred ohms
C. several kilo ohms
D. several mega ohms

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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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