Question # 1

an ideal voltmeter is that which draws:

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small current

no current

high current

none of these

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

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Radio activity

Excitation

Ionization

Electrolysis

Joule’s law is W=

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IR/t

IRt²

IR²t

I²Rt

Radiation was found in:

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1896

1895

1897

1898

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

The symbol of atomic mass number is:

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A

X

N

Z

Circuit breaker works on the principle of:

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Electric current

Magnetism

Electromagnetism

Electrostatics

When resistances are connected in parallel, the current passing through them is:

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Same

Zero

Different

Infinite

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

According to ohm’s law V= :

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I²R

IR²

IR

I/R

The current which does not change its direction is called:

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A.C

D.C

Conventional

Transient current

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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10th Class Physics Chapter 18 Radioactivity English Medium KPK Boards Online Mcqs MCQs With Answers

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