Question # 1

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 unit of electric power is:

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Volt

Watt

Joule

Coulomb

The half of carbon 14 is

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5720 years

5730 years

5740 years

5750 years

battery is one of the source of:

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heat

light

current

sound

The half life of radium - 226 is 1620 years. If N is its total amount then after the four half lives, its left amount will be:

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1/2 N

1/4 N

1/8 N

1/16 N

Total energy supplied in driving one coulomb of charge around a complete circuit is called:

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Potential

Potential difference

Electromotive force

Potential energy

Isotopes are atoms of same element with different :

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Atomic mass

Atomic Number

Number of proton

Number of Neutron

the range of galvanometer to measure current is:

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few amperes

few micro amperes

few milli amperes

mega amperes

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

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20,000 ohm

100,000 ohm

30,000 ohm

2000 ohm

What is the power rating of a lamp connector to a 12 V source when it carries 2.5 A:

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4.8W

14.5W

30W

60W

The half -life of carbon is

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5730 years

5700 years

5720 years

572 years

Release of energy by the sun is due to

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Nuclear fission

Nuclear fusion

Burning of gases

Chemical reaction

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.

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