CBSE Class 8 Science Exploring Forces (Class 8 NCERT New) Quiz 6

1. Which of the following best describes a magnetic field?

A A visible area around a magnet where the magnetic force is exerted B An invisible field that exerts magnetic force on substances sensitive to magnetism C A field that only exists when magnets are touching D A field that can only be detected using a compass

2. Which of the following devices uses a magnet to function?

A A thermometer B A compass C A barometer D A stopwatch

3. If you have a bar magnet and you cut it in half, what happens to the magnetic poles?

A Each half will have only one pole B Each half will have both a north and a south pole C The magnet will lose its magnetism D The poles will switch places

4. Which of the following statements is true about the relationship between mass and weight?

A Mass and weight are the same and do not change B Mass is a measure of matter, while weight is the force of gravity on that matter C Weight is constant, but mass changes with location D Mass is affected by gravity, but weight is not

5. What type of force acts between two magnets without them touching each other?

A Contact force B Magnetic force C Friction force D Applied force

6. What is the name of the force that pulls objects toward Earth?

A Electrical force B Magnetic force C Gravitational force D Nuclear force

7. Which of the following is a component needed to build a basic electromagnet?

A A rubber band and a plastic rod B An iron core, wire, and a battery C A glass tube and a magnet D A wooden stick and copper foil

8. What happens to the gravitational force between two objects as the distance between them increases?

A It increases B It stays the same C It decreases D It doubles

9. Which of the following best describes a noncontact force?

A A force that requires two objects to be touching B A force that acts between objects without physical contact C A force caused only by friction D A force that only works underwater

10. What is the region around a magnet where magnetic forces can be detected called?

A Magnetic pole B Magnetic domain C Magnetic field D Magnetic current