Question # 1

the resistance of an ammeter should be:

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high

very high

low

constant

The half life of radium 226 is

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1600 year

1610 years

1620 years

1630 years

The reason carbon dating work is that.

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Plants and animals are such strong emitters of carbon 14

After a plant or animal dies, it stops in fresh carbon

There is so much non radioactive carbon dioxide in the air

When a plant or animal dies.

The unit of electric power is:

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Volt

Watt

Joule

Coulomb

What is the amount of current passing through an electric heater, if it takes 1800C charge pass through it in 3 minute:

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16 A

10 A

100 A

0.1 A

Nuclear fission was first observed in

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1936

1937

1938

1939

Human skin, in dry conditions, has a resistance of:

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20,000 ohm

100,000 ohm

30,000 ohm

2000 ohm

The value or current I passing through a conductor is inversely proportional to:

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Temperature

Potential difference

e.m.f.

resistance

Safe limit of radiations exposure in one year.

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4 rem

5 rem

3 rem

6 rem

a fuse is connected in series with:

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neutral wire

live wire

earth wire

cable wire

diamond des not conduct electricity, because it has no:

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free electrons

free protons

free neutrons

free positive charge

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

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

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Radio activity

Excitation

Ionization

Electrolysis

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

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