IGCSE Physics Paper-1: Specimen Questions with Answers 27 - 29 of 149

Question 27

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Question

MCQ▾

A road has a length of 60 km. A bus takes 20 min to travel between the two ends of the road. Find average speed of the bus?

Choices

Choice (4)

a.

150 km/h

b.

3.0 km/h

c.

1000 km/h

d.

2.5 km/h

Answer

b.

Explanation

Here to find the average speed we can use the formula for this is given as,

Question 28

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Question

MCQ▾

Which block has the lowest thermal capacity if same heat is applied and he temperature rise is given in the figure here?

Choices

Choice (4)

a.

Temperature rise is 6℃
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b.

Temperature rise is 9℃
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c.

Temperature rise is 3℃
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d.

180 C rising temperature of a block
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Answer

d.

Explanation

Here we show four block. Each of have different value of rise temperature. Now as we know that thermal capacity is a measurable physical quantity which can be define as “The ratio of heat added to an object to the resulting temperature change. ”

Then we can write block of 180 C rising temperature has highest rising temperature thus it has the lowest thermal capacity.

Question 29

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Question

MCQ▾

Why a person takes time to feel hot if he fills glass beaker with hot water?

Choices

Choice (4)

a.

Glass is a poor conductor of heat.

b.

Water is a good conductor of heat.

c.

Water is a poor conductor of heat.

d.

Glass is a good conductor of heat.

Answer

a.

Explanation

Conductor means is allowed to flow something. We can also say that it allowed to passing something from heat. The water is good conductor of heat but in above case takes several seconds before his hand starts to feel the heat. Because glass is poor conductor of heat, so it takes time to passing the heat of water to his hand.

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