Question

1. What will happen if take magnetic compass near a bar magnetic?
(a) The needle will deflect
(b) The needle will not deflect
(c) The needle will reverse the direction
(d) none of these
2. The North end of the freely suspended magnet points towards?
(a) Geographical West
(b) Geographical East
(c) Geographical North
(d) Geographical South

3.Which of the following is true of magnets?
(a)Like poles repel each other
(b) Opposite pole attract each other
(c) magnets has two poles (North and South)
(d) All the above
4. What is incorrect of magnets?
(a) Magnetic power is more in the middle of bar magnets
(b) Magnetite is a natural magnet
(c) Magnetic compass always aligned towards North south direction
(d) None of the above
5. The North Pole of a magnetic needle is painted
(a) red
(b) blue
(c) green
(d) black


MATCH THE FOLLOWING:

(p)Nickel
(u) Magnetic Material


(q)paper
(v) Non Magnetic Material
(r) Wood

(s) Iron


SHORT ANSWERS:
1. Who discovered magnets?
2. Name the poles of a magnet?
LONG ANSWERS:
1. Explain the working principle of magnetic compass?
2. Explian the properties of a magnet in detail?

Answer 1

Answer:

1.a

2.c

3.d

4.a

match

p-v

u-s

q-r

short answer

1. A Greek shepherd named Magnes.

2.north and south pole

long answer

1.A magnetic compass works because the Earth is like a very big magnet and surrounded by a huge magnetic field. The Earth has two magnetic poles near the North and South poles. This magnetic field of the Earth causes a magnetized 'needle' of iron or steel to swing freely into a north-south position.

2.Magnets exhibit the following properties:

• All magnets have two poles: the North Pole and the South Pole
• Magnets attract ferromagnetic materials such as iron, nickel, and cobalt.
• The magnetic force of a magnet is stronger at its poles than in the middle.
• A freely suspended magnet always points in North-South direction.
• There are two types of magnet: Permanent and Temporary magnets. Permanent magnets remain magnetized even without the influence of the external magnetic field. While, temporary magnets lose their magnetism when removed from the external magnetic field, such as an iron pin.

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