Question # 1

When resistance are connected in series the current passing through them is .

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Different

Zero

The same

None of these

The center of curved surface of spherical mirror is called:

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Focus

Axis

Centre

Pole

The unit of resistance is:

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Ω-m

Ω

V

C

As the temperature of a conductor rises, its resistance.

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Increase

Decrease

Does not change

None of these

The equivalent resistance of a parallel combination is

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equal to sum of all resistance

is greater than the largest resistance of combination

is smaller than the smallest resistance of combination

All of these

Which one is a safety device?

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Switch

Fuse

Circuit breaker

Both B and C

Example of mechanical waves is:

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Radio waves

X-rays

Light waves

Sound waves

Joule's law is W = ____________________

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IR/t

IRt²

IR²t

I²Rt

What type of graph is in between V and I?

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Curved

Parabola

Straight line

None of these

Electric current in conductors is due to the flow of:

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Positive ions

Negative ions

Positive charge

Free electrons

The speed of sound in a liquid is …………..than that in gases:

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Ten times

Fifteen times

Five times

Two times

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2Ω

4Ω

8Ω

12Ω

Battery converts chemical energy into which energy:

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Mechanical

Electrical

Thermal

None of these

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10th Class Physics Chapter 14 Current Electricity English Medium KPK Boards Online Mcqs MCQs With Answers

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