# IGCSE Physics Paper-1: Specimen Questions with Answers 122 - 125 of 149

## Question 122

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### Question

MCQ▾

The circuit diagram contains a resistor.

What is the resistance of the resistor?

Choice (4)
a.
b.
c.
d.

c.

### Explanation

Resistors are used in circuit to control the potential difference (p. d).

V = IR

R =

=

The required resistance of the resistor is

## Question 123

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### Question

MCQ▾

The diagram shows some liquid in a measuring cylinder. The mass of the liquid is 20g. What is density of the liquid?

Choice (4)
a.
b.1 g/
c. g/
d.

c.

### Explanation

• Density =
• From the diagram the volume of the liquid is
• Mass of the liquid = 20g
• Density = = g/

## Question 124

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### Question

MCQ▾

Which of the following is a S. I unit of pressure?

Choice (4)
a.Meters
b.Hertz
c.Ampere
d.Pascal

a.

### Explanation

• The S. I unit for pressure is Pascal (pa) which is equal to the N/m2
• Hertz is the unit of Frequency
• Ampere is a unit of current.
• Meters are the units of measurements.

## Question 125

Edit

### Question

MCQ▾

A person clapped his hands near a building and heard echo after 10s. What is the distance of the building from the person if the speed of the sound is taken as 230 m/s?

Choice (4)
a.1000m
b.3200m
c.2300m
d.1150m