IGCSE Physics Paper-1: Specimen Questions with Answers 122 - 125 of 149
Question 122
Question
MCQ▾The circuit diagram contains a resistor.
What is the resistance of the resistor?
Choices
Choice (4) | |
---|---|
a. | |
b. | |
c. | |
d. |
Answer
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
Question
MCQ▾The diagram shows some liquid in a measuring cylinder. The mass of the liquid is 20g. What is density of the liquid?
Choices
Choice (4) | |
---|---|
a. | |
b. | 1 g/ |
c. | g/ |
d. |
Answer
c.Explanation
- Density =
From the diagram the volume of the liquid is
Mass of the liquid = 20g
Density = = g/
Question 124
Question
MCQ▾Which of the following is a S. I unit of pressure?
Choices
Choice (4) | |
---|---|
a. | Meters |
b. | Hertz |
c. | Ampere |
d. | Pascal |
Answer
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
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?
Choices
Choice (4) | |
---|---|
a. | 1000m |
b. | 3200m |
c. | 2300m |
d. | 1150m |
Answer
d.Explanation
- The time taken for echo to be heard t = 10s
Seed of sound (u) = 230m/s
Distance travelled by the sound (d)
d is the distance between person to building and building to the person.
Distance of the building to the person =