IGCSE Physics Paper-1: Specimen Questions with Answers 119 - 121 of 149

Question number: 119

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Question

A person walks to a shop 40 meters from their house. It takes 20 seconds he spent 20 seconds at the shop and then returns home in 30 seconds.

Which of the graphs shows the correct direction of the person?

Choices

Choice (4)Response

a.

Image of the Graphs part -1

Image of the Graphs Part -1

b.

Image of the Graphs part -2

Image of the Graphs Part -2

c.

Image of the Graphs part -3

Image of the Graphs Part -3

d.

Image of the Graphs part -4

Image of the Graphs Part -4

Answer

d.

Explanation

Image of Graphs

Image of Graphs

  • The option D gives correct graph to the given problem.

  • In 20 sec he reached to the shop. He was there for 20 sec and then he returned to home.

  • From shop to home he takes 30 sec.

Question number: 120

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Question

Which change will higher in the pitch of a sound?

Choices

Choice (4)Response

a.

decreasing its frequency

b.

increasing its amplitude

c.

increasing its frequency

d.

decreasing its amplitude

Answer

c.

Explanation

  • The High frequency will change in the pitch of the sound higher

  • And the low frequency leads to low pitch of the sound.

  • High amplitude will result in the louder of the sound

  • And low amplitude will result quite or softer

The Higher frequency

The Higher Frequency

The Lower frequency

The Lower Frequency

Question number: 121

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Question

In which form the heat engine is converted to?

Choices

Choice (4)Response

a.

Heat energy to kinetic energy

b.

Heat energy to mechanical energy

c.

Kinetic energy into mechanical energy

d.

mechanical energy to heat energy

Answer

a.

Explanation

  • A heat engine is a device which converts which converts Heat energy to mechanical energy.

  • In this, heat flows from a high temperature to cold temperature.

  • Heat energy is formed when the particles like atoms molecules and ions.

  • It can transfer from one object to another and creates heat.

  • Mechanical energy comprises of both kinetic and potential energy

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