IGCSE Physics Paper-1: Specimen Questions with Answers 144 - 147 of 149

Question number: 144

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Question

Two persons sit on the seesaw, person B is applying force 300N and 0.5m from the pivot. Person A is applying force of 400N. Calculate the distance that person A must sit from the pivot to balance it.

Image of the Pivot

Image of the Pivot

Choices

Choice (4)

a.

0.52m

b.

1.5m

c.

0.37m

d.

1.0m

Answer

c.

Explanation

Moment (Nm)

Anticlockwise moment = clockwise moment

Force

Distance (m) =

Question number: 145

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Question

A car can accelerate to a speed of 30 m⧵s from rest in 5 seconds. What is its average acceleration?

Choices

Choice (4)

a.

0 m/s2

b.

4 m/s2

c.

6 m/s2

d.

5 m/s2

Answer

c.

Explanation

At

a =

Here u is the initial speed (in rest)

v is the final speed = 30 m/s

t = time

Then

a = =

m/s2

Question number: 146

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Question

6 coulombs of charge flows in the circuit. Calculate the total energy transferred.

The Coulombs of charge

The Coulombs of Charge

Choices

Choice (4)

a.

120J

b.

45J

c.

60J

d.

30J

Answer

a.

Explanation

E = energy transferred

Q = charge flow

V = potential difference (v)

E = 120J

Question number: 147

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Question

In the given table describe the nature of a particles

Choices

Choice (4)

a.

b.

c.

d.

Answer

d.

Explanation

  • Particles are negatively charged. Charge of - particle is -1 and the mass of the particle is th of the proton.

  • particles are fast and light

  • They have medium penetration power.

  • Ionize other atoms not strong as Rays.

  • -rays are not particles they are waves or rays and they do not have mass and charge. And these rays have high penetration power.

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