Attraction and Repulsion between Magnets

Q.

Why capacitor is used in DC motor ?

Q.

Question 2 (iii)

State whether the following statement is true or false.
Similar poles of a magnet repel each other.

Q.

State the laws of magnetism.

Q.

You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.

Q.

Question 11

A toy car has a bar magnet laid hidden inside its body along its length. Using another magnet how will you find out which pole of the magnet is facing the front of the car?

Q.

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

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The two ends of a magnet where its magnetic power is concentrated.

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Question 14

Three identical iron bars are kept on a table. Two out of three bars are magnets. In one of the magnet, the North-South poles are marked. How will you find out which of the other two bars is a magnet? Identify the poles of this magnet.

Q.

In a bar magnet, magnetic attraction is _____ near its ends.

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Question 13

You are provided with two identical metal bars. One out of the two is a magnet. Suggest two ways to identify the magnet.

Q.

What happens when two streams of electrons move parallel to each other in the same direction?

Q.

Heating a magnet does not affect its magnetism.

1. True
2. False

Q.

Explain why it is not possible to magnetize an iron rod beyond a certain limit?

Q.

The arrangement to store two magnets is shown by figures $A,B,C$ and $D$ . Which one of them is the correct arrangement?

1. 

2. 

3. 

4. 

Q.

What Is the difference between a commutator and a slip ring?

Q.

A U-shaped magnet is a natural magnet.

1. True
2. False

Q.

Is magnetic attraction maximum in the middle of a bar magnet?

Q.

Why do we use slip rings in motors?

Q.

A magnet attracts all materials.

1. True
2. False

Q.

Paheli and her friends were decorating the class bulletin board. She dropped the box of stainless steel pins by mistake. She tried to collect the pins using a magnet. She could not succeed. What could be the reason for this?

Q. A___________ is a region within a magnetic material which has uniform magnetization.

1. Magnetic domain
2. Magnetic compass
3. None of these
4. Magnetic cloud

Q.

State whether true or false: A cylindrical magnet has only one pole

1. True
2. False

Q.

GIVE ONE WORD FOR THE FOLLOWING

High attraction points of magnet.

Q. Assertion :The ends of a magnet suspended freely point out always along north south direction. Reason: Earth behaves as a huge magnet.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

When the South pole of a bar magnet is brought near the North pole of a ring magnet, they will _____ each other.

1. attract

2. repel

3. reflect

4. refract

Q.

Which of the following substances is repelled by a strong magnet?

1. Iron

2. Platinum

3. Gold

4. Aluminum

Q.

You will need a magnet and different metallic objects. Take the magnet near the objects, one by one. Is the object attracted by a magnet? List the materials that the objects are made of in two separate groups as shown below:

These metals are attracted by a magnet:

These metals are not attracted by a magnet:

Q.

What is the magnetic moment of a bar magnet?

Q.

___ materials are materials which get attracted by a magnet.

Q. The north of the magnet will be attracted by the south pole of the same magnet.

1. True
2. False