Making a Magnet

Q.

In an electric bell, striker is attracted by a/an__________.

1. cylindrical magnet

2. bar magnet

3. horseshoe magnet

4. electromagnet

Q. A rectangular iron bar cannot be converted into a magnet.

1. True
2. False

Q.

An iron metal bar can be converted into a permanent magnet.

1. By rubbing it with a magnet for few minutes

2. It can't be converted

Q. When ___ strikes at a piece of iron ore, a permanent magnet is formed.

Q. Soft iron pieces are placed across the ends of bar magnet when stored. What are such pieces called?

1. Magnetic preservatives
2. Magnetic refractors
3. Magnetic keepers
4. Magnetic reflectors

Q. A/An can be magnetised by rubbing it with a magnet from one end to the other.

1. copper piece
2. iron piece
3. non-metal

Q. Satish magnetised a piece of iron marked W, X, Y and Z using the rubbing method as shown in the figure.

Which of these parts of the iron piece will become the north pole?

1. W
2. X
3. Y
4. Z

Q. If a magnet is broken into two pieces lengthwise, then how many poles does each piece have?

1. 1
2. 2
3. 3
4. 4

Q. How many soft iron piece(s) is/are required to store a horseshoe magnet?

1. 1
2. 2
3. 4
4. 0

Q. In the process of magentising an iron piece, where will the north pole be formed?

1. 
2. 
3.