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

Question # 1

Joule’s law is W=

Choose an answer

IR/t

IRt²

IR²t

I²Rt

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Question # 2

The product of frequency and wavelength is equal to:

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Time period

Amplitude

Wave speed

Wave energy

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Question # 3

A unit of electric charge, equal to the charge of 6.25x10¹⁸ electrons is:

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Electricity

Coulomb

Electric potential

Volt

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Question # 4

In A.C. generator flux will be zero if coil is to the field.

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90^o

45^o

Parallel

Inclined

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Question # 5

The symbol of alpha particles is:

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4AHe

42He

0-1B

00Y

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Question # 6

The unit of spring constant is:

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Nm²

Nm^-1

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Question # 7

In simple Harmonic motion, the acceleration of the body is _____ proportional to the displacement.

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Inversely

Directly

Equally

None of these

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Question # 8

The unit of electrical energy is:

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Joule

Watt

Volt

Electron volt

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Question # 9

The half -life of carbon is

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5730 years

5700 years

5720 years

572 years

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Question # 10

The critical angle for glass to:

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24^o

48^o

42^o

50^o

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Question # 11

The point through which rays of light pass after reflection from concave mirror is called principal:

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Focus

Circle

Axis

Radius

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Question # 12

Two switches attached in series work on which operation?

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AND operation

OR operation

NOT operation

NOR operation

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Question # 13

When frequency of sound wave is increased, which of the following decreases?

i) Wavelength ii) Period iii) Amplitude

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i only

(iii) only

i and ii only

i and iii only

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