ECAT Pre Engineering Physics Chapter 16 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

Try The MCQ's Test For Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Physics ECAT Pre Engineering Chapter 16 Alternating Current

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Question # 1

Which of the following diode is used for the detection of light

Question # 2

A changing magnetic flux creates around itself

Question # 3

The device which allows only the flow of an A.C. through a circuit is

Question # 4

The highest value reached by the voltage or current:

Question # 5

The Instantaneous value of alternative current maybe:

Question # 6

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

Question # 7

The magnitude of alternative voltage V:

Question # 8

In RLC series circuit, resonance occurs when

Question # 9

At resonance, the impedance of RLC series circuit is

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

Alternating current is produced by a voltage source which polarity:

Question # 14

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

Question # 15

At resonance, the phase angle for RLC series resonance circuit equals

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ECAT Physics Chapter 16 Important MCQ's

Sr.# Question Answer
1 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
2 The wave form of alternating voltage is the graph between:
A. Voltage across X-axis and time across y-axis
B. Current and time
C. Voltage along y-axis and time along x-axis
D. Voltage and current
3 The sum of positive and negative peak values is called:
A. Instantaneous value
B. Peak value
C. Rms valuie
D. Peak-to peak-value
4 The impedance of RLC series resonance circuit at resonant frequency is
A. Greater than R
B. Equal to R
C. Less than R
D. None of these
5 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
6 When electrons in the transmitting antenna vibrate 94000 time per second, they produce radiowaves having frequency
A. 9.4 kHz
B. 940 kHz
C. 94 kHz
D. None of these
7 In free space, the speed of electromagnetic waves is
A. 3 x 108ms-1
B. 3 x 106ms-1
C. 4 x 107ms-1
D. 3 x 109ms-1
8 Average value of A.C voltage during one cycle is
A. 1
B. Zero
C. Maximum
D. Variable
9 Which one of the following waves belongs to electromagnetic spectrum
A. Radio and TV waves
B. Radar waves
C. Micro waves
D. All of them
10 When the emitter-base junction of a transistor is reverse biased, collector current
A. Reverses
B. Increases
C. Decreases
D. Stops

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