Grade 9 Physics – Magnetism and Electromagnetism Important Questions and Answers

Grade 9 Physics – Magnetism

Important Questions and Answers

ONE MARK QUESTIONS

1.​ What is magnetism?
Answer: The property of a magnet to attract magnetic materials is called
magnetism.

2.​ Name the poles of a magnet.
Answer: North pole and South pole.

3.​ Which poles attract each other?
Answer: Unlike poles attract each other.

4.​ Which poles repel each other?
Answer: Like poles repel each other.

5.​ What is magnetic field?
Answer: The region around a magnet where magnetic force acts.

6.​ What are magnetic field lines?
Answer: Imaginary lines representing magnetic field.

7.​ Name the instrument used to find direction.
Answer: Magnetic compass

8.​ What is an electromagnet?
Answer: A temporary magnet produced by electric current.

9.​ What is a permanent magnet?
Answer: A magnet that retains magnetism for a long time.

, 10.​ Name the material used in electromagnets.
Answer: Soft iron

11.​ What is neutral point?
Answer: A point where magnetic fields cancel each other.

12.​ What is magnetic induction?
Answer: Producing magnetism in a material by induction.

13.​ Name one use of electromagnet.
Answer: Electric bell

14.​ What is artificial magnet?
Answer: A man-made magnet.

15.​ What is natural magnet?
Answer: A naturally occurring magnet.

TWO MARK QUESTIONS

1.​ Differentiate between natural magnet and artificial magnet.
Answer:
Natural Magnet:
●​ Found in nature.
●​ Example: Lodestone
Artificial Magnet:
●​ Man-made magnet.
●​ Example: Bar magnet

2.​ State the properties of magnetic field lines.
Answer:
●​ Magnetic field lines form closed curves.
●​ They emerge from north pole and enter south pole.
●​ They never intersect each other.