Making of Magnets

Q. Single touch method

Q. Why repulsion is the surest test for magnet?

Q.

Name four devices which use artificial magnets.

Q. Which out of Cu2+, Fe2+ , and Cr3+ has highest paramagnetism and why

Q.

Define magnetization. Explain any one method to magnetize a material.

Q.

Name the material which can be used to make a permanent magnet and electromagnet.

Q.

You are given an iron strip. How will you convert it into a permanent magnet?

1. By placing a magnet near it for few hours

2. By rubbing it with a magnet for few minutes

3. It can't be converted

4. By putting into hot water

Q. Which of the following statements is/are correct?
1. Magnets attract gold rings.
2. By heating, magnets lose their magnetic properties.
3. A freely suspended magnet rests in East-West direction.

1. 1 and 2 only
2. 2 and 3 only
3. 2 only
4. 3 only

Q.

Can a magnet that has lost its strength be re-magnetized?

Q. Which of the following equipment do NOT utilise magnets in them?

1. Refrigerator door
2. Audio speaker
3. Incandescent bulb
4. ATM card

Q. Metals which can be turned into permanent magnets are classified as.

1. paramagnets
2. diamagnets
3. ferromagnets
4. electromagnets

Q. How can corn flakes attract to magnet

Q. Which of these can be attracted by a magnet?

1. Plastic
2. Rubber
3. Glass
4. Steel

Q. Which of the following equipment do NOT utilise magnets in them?

1. Refrigerator door
2. Audio speaker
3. Incandescent bulb
4. ATM card

Q. Which of the following can be a sure test for magnetism?

1. Attraction
2. Repulsion
3. Both attraction and repulsion
   
4. Neither attraction nor repulsion
   

Q. Which of the following statements is/are correct?
1. Magnets attract gold rings.
2. By heating, magnets lose their magnetic properties.
3. A freely suspended magnet rests in East-West direction.

1. 1 and 2 only
2. 2 and 3 only
3. 2 only
4. 3 only

Q. Aman mixed few nickel clips, gold coins, silver rings and aluminium nails together. Which among these can he separate using an electromagnet?

1. Nickel clips
2. Gold coins
3. Silver rings
4. Aluminium nails

Q. Aman mixed few nickel clips, gold coins, silver rings and aluminium nails together. Which among these can he separate using an electromagnet?

1. Nickel clips
2. Gold coins
3. Silver rings
4. Aluminium nails

Q. Which of these can be attracted by a magnet?

1. Plastic
2. Rubber
3. Glass
4. Steel

Q. give an experiment to show that heating demagnetises a magnet.