Question # 1

The rating of a fuse wire is always expressed in:

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ampere-hours

KWh

Volts

Amperes

an ideal voltmeter is that which draws:

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small current

no current

high current

none of these

Joule’s law is W=

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IR/t

IRt²

IR²t

I²Rt

When a uranium (92 protons) ejects a beta particle, how many protons are left in the remaining nucleus?

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92 protons

91 protons

93 protons

89 protons

the range of galvanometer to measure current is:

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few amperes

few micro amperes

few milli amperes

mega amperes

The symbol of alpha particles is:

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4AHe

42He

0-1B

00Y

The half life of carbon -14 is:

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5730 years

5740 years

5750 years

5760 years

100x10³ A= :

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10^-3 A

10^-2 A

10 A

10^-1A

Isotopes are atoms of same element with different :

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Atomic mass

Atomic Number

Number of proton

Number of Neutron

The power of small fan is:

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40 W

50 W

60 W

80 W

What type of graph is in between V and I, if metal obeys ohm’s law:

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Curved

Parabola

Straight line

None of these

Radiations present in atmosphere due to the presence of different radioactive elements are:

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Cosmic radiations

Background radiations

secondary radiations

Electromagnetic radiations

What happen to the atomic number of an element which emits one alpha particle and a beta particles.

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Increases by 1

Stay the same

Decrease by 2

Decrease by 1

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

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