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9th Class Physics English Medium KPK Boards Online Mcqs MCQs With Answers

Question # 1

All bodies absorb or emit energy by

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convection

radiation

conduction

both (a) & (c)

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Question # 2

The forces that are parallel to each other and have the same direction are called:

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Like parallel forces

Unlike parallel forces

Resultant forces

Net forces

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Question # 3

The work is negative if the angle between force and displacement is:

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0°

45°

90°

180°

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Question # 4

More radiation is reflected by the surface.

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White

Coloured

Black

Rough

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Question # 5

The energy stored in coal is:

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Heat energy

Kinetic energy

Chemical enegy

Nuclear energy

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Question # 6

The velocity of freely falling bbodies moving upward.

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Decreases

Increases

Constnat

zero

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Question # 7

If a liquid of mass 'm' requires thermal energy 'ΔQv' to completely change into gas at its boiling point without any change in its temperature, then its latent heat of vapourization can be calculated as following:

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Hv = m/ΔQv

Hv = mΔQv

Hv = cmΔQv

Hv =ΔQv/m

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Question # 8

Force per unit Area is :

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Pressure

Density

Efficiency

Nil

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Question # 9

A body has mass 986 Kg than W = ............... .

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9860 kg

9860 N

9860 m/s2

Nil

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Question # 10

If the force of 25 N pulls a stone through a distance of 5 cm in its direction the magnitude of work will be:

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5 J

125 J

175 J

200 J

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Question # 11

The temperature of sun surface is:

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5000°C

4000°C

6000°C

7000°C

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Question # 12

If Fx and Fy are rectangular components of vector F, then its direction is determined by the relation

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θ = sin-1 Fv/Fx

θ = tan-1 Fx/Fy

θ = tan Fx/Fy

θ = tan Fy/Fx

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Question # 13

In prefix form, 0.000001 would be expressed as.

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0.1 mm

0.01 mm

0.001 mm

0.0001 mm

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