IGCSE Physics Paper-1: Specimen Questions with Answers 21 - 23 of 149

Question number: 21

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Question

Find average speed of molecules in 2 boxes if they are filled with air and one is on heater and the other is on bench.

Two metal boxes put on heater and bench

Two Metal Boxes Put on Heater and Bench

Choices

Choice (4)Response

a.

Box X – Fast, Box Y – Slow

b.

Box X – Fast, Box Y – Zero

c.

Box X – Slow, Box Y – Fast

d.

Box X – Zero, Box Y – Fast

Answer

a.

Explanation

Here box X is on heater and the box Y is on bench.

Then molecule in box x is moving faster than box Y because of heat. And so molecule in box Y is moving slowly.

Question number: 22

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Question

A glass tank contains some water with length QR and the width RS of the tank. What other distance is same to RS so that we can find volume of the water?

A glass tank filled with some water

A Glass Tank Filled with Some Water

Choices

Choice (4)Response

a.

TV

b.

ST

c.

TU

d.

SV

Answer

c.

Explanation

Here in given figure, water inside the glass tank filled till height ST.

Now, to find the volume we must know about Length, breath and height.

Here length and width QR and RS is given respectively. And from figure it is clear that width of the tank is,

Question number: 23

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Question

Which diagram correctly shows rays passing through a camera lens?

Choices

Choice (4)Response

a.

Ray passing through a camera len

Ray Passing through a Camera Len

b.

Ray passing through camera lens.

Ray Passing through Camera Lens.

c.

Ray passing through a camera lens.

Ray Passing through a Camera Lens.

d.

Correct arrangement of rays

Correct Arrangement of Rays

Answer

a.

Explanation

From camera lens we got small image at opposite side of the object. Only two options show the smaller image than the object. But arrangement of the rays correct in following image,

Correct arrangement of ray

Correct Arrangement of Ray

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