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PPSC Physics Chapter 6 Electricity and Magnetism MCQs With Answers

Question # 1

If positive terminal of the battery is connected to n-type and negative terminal of the battery is connected to p-type then the diode is.

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Saturated

A gate

Forward biased

Revere biased

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Question # 2

What type of current is produced by batteries.

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Direct current

Alternating current

Pulsating current

Convection current

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Question # 3

The electric heater takes a current of 4 A from a 250 V supply . How long would it take the heater to convert 400,000 J of electric energy.

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100 s

200 s

400 s

750 s

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Question # 4

The electric bulb does not obey Ohm's law because.

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Current changes

Resistance changes

Heat is produced

All of these

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Question # 5

In a n-type material there is an excess of.

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Free electrons

Holes

Quarks

Measons

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Question # 6

The effective resistance offered by the resistance capacitance and inductance in an A.C. circuit is known as

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Impedance

Resistance

Capacitance

Reactance

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Question # 7

Which one of the following is diamagnetic

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Liquid oxygen

Air

Water

Copper sulphate

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Question # 8

Which one fo the following is based on the diffraction and repulsion of electric charge.

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Capacitor motor

Transformer

Induction motor

synchronous motor

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Question # 9

If we double both the current and the voltage in circuit while keeping its resistance constant the power.

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Remains unchanged

Halves

Doubles

quadruples

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Question # 10

A torch bulb uses a 3 V supply and makes a current of 0.2 A It is switched on for one minute How much electrical energy is used.

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0.6 J

12 J

24 J

36 J

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Question # 11

At low frequency the value of resistance of certain capacitors is.

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small

Large

Moderate

Unmeasurable

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