Earth's Magnetism

Q. The region with a high density of magnetic field lines will have magnetic strength.

1. high
2. low
3. zero
4. infinite

Q. Magnetic field lines of a bar magnet appear to be coming out from the and going into the magnet at the .

1. centre
2. top
3. south pole
4. north pole

Q. Which of the following will be magnetised the most in the presence of a magnetic field?

1. Iron
2. Graphite
3. Wood
4. Plastic

Q. Ram wants to make a magnet. Which one of these materials is not useful for him?

1. Steel
2. Nickel
3. Cobalt
4. Wood

Q.

In case you lost your way, which of the following would you choose to find the direction?

1. Bar magnet

2. A plastic plate

3. Wooden Stick

4. Woolen thread

Q.

The materials which are attracted towards a magnet are called ______.

1. magnetic materials
2. non-magnetic materials
3. conductors
4. insulators

Q.

A compass has a small balanced pointer that always points North-South. This is because:

1. The stars exert a force on the needle

2. Gravity makes the needle point this way

3. The compass needle points to cold places

4. The earth has a magnetic field and the pointer is magnetic