Fun with Magnets Test

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Fun with Magnets Test - 9

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Weekly Quiz Competition

Question 1
1 / -0

Fill in the blank:

________ shows attractive property.

A
Iron

B
Magnet

C
Aluminium

D
Nickel

Solution

Magnets have an attractive property and they attract magnetic substances or other magnets (with opposite poles facing) towards them. This attractive property is zero at the middle and maximum at the ends of a bar magnet. Magnetic materials do not exhibit attraction until they are magnetized, permanently or temporarily.
Question 2
1 / -0

What happens, when a magnetic substance is heated?

A
It loses its magnetism

B
It becomes a strong magnet

C
Does not effect the magnetism

D
Either (b) and (c)

Solution

When a magnetic substance is heated it loses its magnetic property.
It is because all the atomic magnet becomes randomly oriented due to heat.
Question 3
1 / -0

P Q R
Magnets Magnetic Substance Non Magnetic Substance
After repeated rubbing with a magnet in the same direction, a piece of substance fails to get magnetised, it should be placed in the group(s) :

A
P & Q

B
Q & R

C
Q

D
R

Solution

If the substance can not be magnetized by repeated rubbing with a magnet in the same direction, then the substance is a non-magnetic substance. Non-magnetic materials are materials that are not attracted to a magnet. Examples include plastic, water, silver, paper, gold, etc. Hence it will fall into the R category.
Question 4
1 / -0

Bar magnet has zero attractive property

A
At the north pole

B
At its centre

C
At the south pole

D
At any arbitrary point

Solution

Magnets have an attractive property and they attract magnetic substances towards them. This attractive property is zero at the middle and maximum at the ends of a bar magnet.
Question 5
1 / -0

When the S-pole of a magnet is placed near an unkown pole of another magnet, the two magnets.

A
Repel each other because the unknown pole is a N-pole

B
Repel each other because the unknown pole is S-pole

C
Attract each other because the unknown pole is S-pole

D
None of the above

Solution

A charged body can induce charges of the opposite sign in an uncharged body. It can only be attracted due to induction of opposite charges on the charged body. However, if the test body is charged, it will be repelled by a tester charge of the same sign. Therefore, repulsion is a sure test for the presence of charge.When the S-pole of a magnet is placed near an unkown pole of another magnet, the two magnets repel each other because the unknown pole is S-pole
Question 6
1 / -0

To find the S-pole of a compass is to find the end of the compass needle that

A
Is attracted to an iron

B
Points to the north

C
Repelled by the S-pole of a magnet

D
Attracted by the S-pole of a magnet

Solution

In a compass, the magnetic needle's north pole points toward earth's magnetic south. Thus its tip is north and its other end is south which is repelled by south pole of other magnet.
Question 7
1 / -0

A metal bar is confirmed to be a magnet when it

A
Attracts all metal

B
Attracts another magnet

C
Attracts a piece of iron

D
Repels a compass needle

Solution
Question 8
1 / -0

Which of the following can be magnetic material?

A
Wood

B
Plastic

C
Ceramic

D
Iron

Solution

$$\textbf{Explanation}$$
$$\bullet$$ Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic).
$$\bullet$$These include the elements iron, nickel, and cobalt and their alloys, some alloys of rare-earth metals, and some naturally occurring minerals.
$$\textbf{Hence option D correct}$$
Question 9
1 / -0

Which of the following is not a magnetic material?

A
Steel

B
Copper

C
Nickel

D
Cobalt

Solution

$$\textbf{Explanation:}$$
$$\bullet$$Those materials which are not attracted by a magnet are called Non-magnetic materials
$$\bullet$$For example plastic, rubber, water,Copper etc are non-magnetic materials.
$$\bullet$$Non-magnetic substances cannot be magnetized.
$$\textbf{Hence option B correct}$$
Question 10
1 / -0

What happens when the N-pole of a magnet is brought near the N-pole of a suspended magnet?

A
It attracts the suspended magnet

B
It pushes the suspended magnet away

C
It makes the suspended magnet rotate

D
It doesn't effect the suspended magnet in any way

Solution

A permanent magnet causes repulsion with one pole when the poles are brought in turn near a suspended magnet. An unmagnetised magnet material would be attracted to both poles. Magnetism can work over a distance and magnets can exert a force (push or pull) on objects without making contact with them.
when the N-pole of a magnet is brought near the N-pole of a suspended magnet It pushes the suspended magnet away

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P	Q	R
Magnets	Magnetic Substance	Non Magnetic Substance

Fun with Magnets Test - 9

Result

Fun with Magnets Test - 9

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SHARING IS CARING

Question 1

Iron

Magnet

Aluminium

Nickel

Solution

Question 2

It loses its magnetism

It becomes a strong magnet

Does not effect the magnetism

Either (b) and (c)

Solution

Question 3

P & Q

Q & R

Q

R

Solution

Question 4

At the north pole

At its centre

At the south pole

At any arbitrary point

Solution

Question 5

Repel each other because the unknown pole is a N-pole

Repel each other because the unknown pole is S-pole

Attract each other because the unknown pole is S-pole

None of the above

Solution

Question 6

Is attracted to an iron

Points to the north

Repelled by the S-pole of a magnet

Attracted by the S-pole of a magnet

Solution

Question 7

Attracts all metal

Attracts another magnet

Attracts a piece of iron

Repels a compass needle

Solution

Question 8

Wood

Plastic

Ceramic

Iron

Solution

Question 9

Steel

Copper

Nickel

Cobalt

Solution

Question 10

It attracts the suspended magnet

It pushes the suspended magnet away

It makes the suspended magnet rotate

It doesn't effect the suspended magnet in any way

Solution

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