IGCSE Physics Paper-1: Specimen Questions with Answers 1 - 3 of 149

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Question 1

Question MCQ▾

A man tunes his radio from 95 Hz to 102 Hz. What does this explain about radio?

Choices

Choice (4)

a.

its amplitude

b.

its frequency

c.

its speed

d.

its wavelength

Edit

Answer

a.

Explanation

A man tunes his radio to station broadcasting on from 95 Hz to 102 Hz.

Now from given option, amplitude is the unit less quantity, unit of speed is and unit of wavelength is meter.

Only unit of frequency is Hz. So man turns frequency of station.

Question 2

Question MCQ▾

4 divers are there, 2 in sea water and 2 in fresh water. Which diver will face greatest pressure known that oil is denser than sea water?

Divers Swimming in Sea Water and Oil

Choices

Choice (4)

a.

A

b.

C

c.

D

d.

B

Edit

Answer

c.

Explanation

Pressure in liquid we can define as

Where ρ = Density of liquid

g = Gravitational acceleration

h = Height above the point at which we measure the pressure

In this case density of oil is denser than sea water and height of diver D is more.

Thus on diver D is there the greatest pressure.

Question 3

Question MCQ▾

There are 2 thermometers X and Y, one above and other below. After some time, reading on thermometer changes but ice does not melt. Reading of which thermometer will change?

Ice Cube with Two Thermometers

Choices

Choice (4)

a.

Thermometer X; Reason: Warm air rises from the ice cube

b.

Thermometer Y; Reason: Warm air falls from the ice cube

c.

Thermometer X; Reason: Cool air rises from the ice cube

d.

Thermometer Y; Reason: Cool air falls from the ice cube

Edit

Answer

d.

Explanation

Here both thermometer at the same distance through ice cube.

Now, cool air falls from the ice cube. Thermometer X has temperature more than cool air then it not effect on reading. But thermometer Y has temperature less than cool air then it effect on reading.

So, reading on thermometer Y is change

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