Question # 1

The phenomenon in which radiations convert the matter into positive and negative ions is called:

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Radio activity

Excitation

Ionization

Electrolysis

As the temperature of a conductor rises, its resistance:

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Increases

Decreases

Does not change

None of these

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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2 Ω

4 Ω

8 Ω

12 Ω

The symbol of alpha particles is:

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4AHe

42He

0-1B

00Y

A thermistor is a dependent resistors:

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Heat

temperature

energy

mass

Nuclear fission was first observed in

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1936

1937

1938

1939

Which among the following radiation has more penetrating power?

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A beta pareticle

A gamma particle

An alpha particle

None of these

The colour of live wire is:

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Black or blue

Green or yellow

White or grey

Red or brown

The A.C used in Pakistan has frequency:

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60 Hz

30 Hz

50 Hz

130 Hz

The current which does not change its direction is called:

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A.C

D.C

Conventional

Transient current

the power of washing machine is:

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700 W

750 W

650 W

800 W

The half of carbon 14 is

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5720 years

5730 years

5740 years

5750 years

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Physics 10th Class English Medium Unit 9 Online Test MCQs With Answers

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