# IGCSE Physics Paper-1: Specimen Questions with Answers 143 - 145 of 149

## Question number: 143

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MCQ▾

### Question

Potential difference is measured by

### Choices

Choice (4)Response

a.

Galvanometer

b.

wattmeter

c.

voltmeter

d.

Ammeter

c.

### Explanation

• The amount of energy that charge carriers have between two points in a circuit is known as potential difference.

• The Potential difference of 1 volt is 1 joule of energy is transferred for each coulomb of charge that is moving through the circuit.

• The potential difference is measured by Voltmeter.

## 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.

### Choices

Choice (4)Response

a.

0.52m

b.

1.5m

c.

0.37m

d.

1.0m

c.

### Explanation

Moment (Nm)

Anticlockwise moment = clockwise moment

Force

Distance (m) =

## Question number: 145

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MCQ▾

### 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)Response

a.

0 m/s2

b.

4 m/s2

c.

6 m/s2

d.

5 m/s2

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

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