Magnetism Test

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Magnetism Test - 1

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Weekly Quiz Competition

Question 1
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Which of the following characteristics of magnetic field lines is incorrect?

A
They trace closed paths.

B
They never intersect each other.

C
They run from the south pole to the north pole inside a magnet.

D
They emanate from the south pole and terminate at the north pole.

Solution

Magnetic field lines emanate from the north pole of a magnet and terminate at its south pole.
Question 2
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Which of the following materials cannot be magnetized by using ‘touch-stroke’ method?

A
Iron

B
Cobalt

C
Wood

D
Nickel

Solution

Touch-stroke method is used to magnetise magnetic objects. A non-magnetic material cannot be magnetized by this method. Since wood is non-magnetic in nature, it cannot be magnetized by using ‘touch-stroke’ method.
Question 3
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Which of the following statements regarding the magnetic field produced by a bar magnet is incorrect?

A
Magnetic field lines are continuous in nature.

B
Magnetic field lines have both magnitude and direction.

C
Magnetic field lines intersect each other at the poles of a bar magnet.

D
Magnetic field lines are stronger at the poles and weaker near the centre of a bar magnet

Solution

One of the characteristic properties of magnetic field lines is that they never intersect each other. It is because of the fact that if two magnetic lines of force were to intersect, then at the point of intersection a compass needle would point toward two different directions, which is impossible.
Question 4
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An electromagnet is not used in the functioning of which of the following devices?

A
An electric motor

B
A generator

C
A telescope

D
A door bell

Solution

An electric motor converts electrical energy into mechanical energy.

A generator converts mechanical energy into electrical energy.

A telescope is used for viewing objects situated at large distances.

A door bell converts electrical energy into sound energy.
Question 5
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A magnet can attract a

A
stone

B
paper

C
safety pin

D
rubber band

Solution

A magnet can attract only magnetic materials such as iron, nickel, etc. A safety pin is made of iron. Hence, a magnet can attract a safety pin.
Question 6
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Which of the following actions would not result in the loss of magnetic property of a magnet?

A
Heating

B
Hammering

C
Dipping in the water

D
Dropping from a height

Solution

A magnet looses its magnetic property if it is not handled carefully. Heating, hammering, and dropping it from a height results in the loss of its magnetic property. Dipping a magnet in a pool of water does not result in the loss of its magnetic property.

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Magnetism Test - 1

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Magnetism Test - 1

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SHARING IS CARING

Question 1

They trace closed paths.

They never intersect each other.

They run from the south pole to the north pole inside a magnet.

They emanate from the south pole and terminate at the north pole.

Solution

Question 2

Iron

Cobalt

Wood

Nickel

Solution

Question 3

Magnetic field lines are continuous in nature.

Magnetic field lines have both magnitude and direction.

Magnetic field lines intersect each other at the poles of a bar magnet.

Magnetic field lines are stronger at the poles and weaker near the centre of a bar magnet

Solution

Question 4

An electric motor

A generator

A telescope

A door bell

Solution

Question 5

stone

paper

safety pin

rubber band

Solution

Question 6

Heating

Hammering

Dipping in the water

Dropping from a height

Solution

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