Test for Magnetism

Q. Distinguish between the two methods of making artificial magnets

Q.

___is the surest test for magnetism.

Q.

Magnet can attract metal objects.

1. True

2. False

Q.

Which of the following group of metals represent are magnetic properties?

1. Copper, lead, brass, zinc

2. Iron, aluminium, zinc, lead

3. Aluminium, copper

4. Cobalt, nickel, iron, steel

Q. Harish was asked to identify a piece of soft iron put in a basket of 10 magnets of the same shape and size. Which is the easiest way to identify the iron piece at the earliest?

1. By passing a current through the magnet.
2. By conducting repulsion test using any two magnets at a time.
3. By bringing another strong magnet near the basket.
4. By dropping all magnets into the water.

Q.

An object is brought near a magnet. The object is attracted towards the magnet when it faces north pole of a magnet and repelled when it faces south pole of a magnet. The object is definately a magnet itself.

1. True

2. False

Q.

Given a piece of metal, ___ is necessary to test whether it is a magnet or not.

1. A magnet

2. A compass

3. no object

4. A piece of iron

Q. Nikhilesh has a small piece of metal and a thread. He wants to find whether the metal is a magnet or not. Which of these things would he need?

1. A piece of magnetic substance
2. He does not require anything more
3. A magnet or a compass
4. A piece of non-magnetic substance

Q. Vishnu brought a magnet near 3 pins made up of different materials. Pins Y and Z get attracted whereas pin X remains in its place as shown below.

What are the pins X, Y, and Z made up of?

1. Pin X - Copper
   Pin Y - Iron
   Pin Z - Steel
2. Pin X - Steel
   Pin Y - Nickel
   Pin Z - Aluminium
3. Pin X - Iron
   Pin Y - Copper
   Pin Z - Brass
4. Pin X - Copper
   Pin Y - Brass
   Pin Z - Cobalt

Q. Which of the following statements are true about the needle in a magnetic compass?

1. It can attract magnetic materials.
2. When a magnet is brought near, it gets deflected.
3. It aligns with the Earth's magnetic field even when another magnet is brought near it.
4. When freely suspended, it comes to rest in the Earth's north-south direction.

Q.

What is a magnetic substance? Give two examples?

Q.

Nikhilesh has a strange piece which can attract many objects including some non-magnetic substances. What are the things would he need to find whether it is a magnet or not?

1. A magnet or a compass

2. A piece of magnetic substance

3. A piece of non-magnetic substance

4. He does not require anything more

Q.

An object is brought near a magnet. The object is attracted towards the magnet when it faces north pole of a magnet or when it faces south pole of a magnet. The object is a magnet itself.

1. True

2. False

Q.

A magnet can attract only magnetic substances.

1. True
2. False

Q. The needle of any magnetic compass gets deflected and point to North direction due to influence of.

1. Earth's gravity
2. Earth's magnetism
3. Sunlight
4. Winds

Q. Distinguish between the two methods of making artificial magnets

Q.

how to levitate a magnet

Q.

A magnet attracts

1. Magnetic substances

2. Anything close to it

3. Charged substances

4. Flies

Q. Harish was asked to identify a soft iron placed in a basket with 9 other magnets of the same shape and size. Which is the easiest way of identifying the iron piece at the earliest?

1. By suspending the magnets one at a time.
2. By conducting repulsion test using any two magnets at a time.
3. By heating all the magnets together.
4. By dropping all the magnets into the water.

Q. Attraction is a reliable test of magnetism.

1. False
2. True

Q. When a magnet is placed near a rectangular bar, the bar moved away. What can be concluded about the bar?

1. It is a magnet.
2. It is made up of aluminium.
3. It is made up of iron.
4. It is not a magnet.

Q. Attraction is a sure for the presence of magnetism.

1. True
2. False