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PPSC Physics Chapter 6 Electricity and Magnetism MCQs With Answers

Question # 1

Which of the following is not the SI unit of magnetic flux density.

Choose an answer

Wb m2

N A-1 m-1

Tesla

N mA-1

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Question # 2

The strength of the magnetic field around the current carrying conductor is

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Smaller near the conductor

Greater near the conductor

constant everywhere

Changing everwhere

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Question # 3

The SI unit of mutual induction a

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Vs-1 A-1

V m -1 A-1

Henry

Tesla

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Question # 4

What is the power factor of LR circuit.

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Unity

Zero

infinity

Between 0 and 1

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Question # 5

The sum of positive and negative peak values are usually written as.

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rms value

p-p value

Peak value

Instantaneous value

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Question # 6

The process of mixing sound waves with carrier waves is known as.

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Rectification

amplification

Modulation

Demodulation

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Question # 7

A positive and a Negative charge are initially 4 cm apart When they are moved closer together so that they are now only 1 cm part the force between them is.

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4 times smaller than befor

4 times larger than before

8 times larger than before

16 times larger than before

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Question # 8

To measure the accurate value of potential difference across two points, the voltmeter should have.

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Zero resistance

small resistance

Large resistance

Infinite resitance

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Question # 9

When current in an inductor is increasing

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energy is lost

Energy is being stored in the magnetic field of the inductor

Energy is being drained from the magnetic field of the inductor

Eddy current is produced

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Question # 10

The building up of electric charge on the surface of objects is termed as.

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Static electricity

Electric charge

Electric current

Electrostatic induction

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Question # 11

The direction of induced e.m.f in a circuit is in accordance with conservation of.

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Mass

Charge

Momentum

Energy

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