Chapter 13: Fun with Magnets
Choose the correct answer,
Q1. The magnetic properties of a magnet cannot be destroyed by
(c) dropping on a hard surface
Answer: (d) boiling
Q2. Which two ends of a magnet are called magnetic poles?
(a) North pole
(b) South pole
(c) North and south pole
(d) Self demagnetisation
Answer: (c) North and south pole
Q3. Magnets attract
Answer: (d) iron
Q4. Which is an example of a magnetic substance?
(d) All of these
Answer: (d) All of these
Q5. A freely suspended bar magnet rests in
(a) north-south directions
(b) east-west directions
(c) upside down
(d) any direction by chance
Answer: (a) north-south directions
Q6. Attraction is seen between the poles of two bar magnets in the case of
(a) N-pole of one magnet with N-pole of other
(b) N-pole of one magnet with S-pole of other
(c) S-pole of one magnet with S-pole of other
(d) all of these cases will show attraction
Answer: (b) N-pole of one magnet with S-pole of other
Q7. Which is a natural magnet?
Answer: (a) Magnetite
Q8. Choose the wrong statement
(a) Heat can destroy magnetic properties of a magnet.
(b) Magnets are made up of different materials and different shapes.
(c) There is a maximum attraction in middle of a magnet.
(d) Magnetite does not show magnetic properties.
Answer: (d) Magnetite does not show magnetic properties.
Q9. Magnets have a shape
(b) ball ended
(c) horse shoe
(d) all of these
Answer: (d) all of these
Q10. When a bar magnet is brought near iron dust, most of the dust sticks
(a) near the middle
(b) equally everywhere
(c) near two ends
(d) at the middle and ends
Answer: (c) near two ends