Fun with Magnets Online Test

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Fun with Magnets

Description: It will cover the chapter of fun with magnet
Number of Questions: 20
Created by: Girish Goud
Tags: fun with mangets Fun with Magnets Classifying Materials into Conductors and Insulators Electric Switch Formation of an Electric Circuit Connection of Electric Bulb with Electric Cell Construction of Electric Cell and Electric Bulb

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The earth behaves like a huge bar magnet with its magnetic north pole near the geometrical __________ pole.

south
north
east
northeast
none of these

When a magnet is suspended freely, it always aligns itself in ________ direction.

north
north-south
north-west
north-east
south

In which direction does the north end of a freely suspended magnet point?

Geographical north
Geographical south
Geographical east
It does not have any fixed direction
None of these

Which of the following is the sure test of magnetism?

Attraction between the opposite poles.
Repulsion between the same poles.
When suspended freely, a magnet always aligns in N-S direction.
Two poles of a magnet are indivisible.
There is no sure test of magnetism.

_______________ is the device used by pilots and navigators to find a direction.

Weather vane
Chronometer
Sextant
Magnetic compass
None of these

By which of the following ways does a magnet get demagnetised?

By heating the magnet
By throwing it from a height
By hammering it violently
All of the above
A magnet never gets demagnetised

Which of the following is not the property of a magnet?

A magnet attracts magnetic material.
When a magnet is suspended freely, it points in N-S direction.
Same poles of a magnet attract and opposite poles repel.
Magnetic influence can pass through the screen of cloth, plastic and paper.
The force of magnetic attraction is the maximum at poles.

______________ is the only natural magnet.

Magnetite
Ebonite
Cobalt
Nickle
There is no natural manget. Magnets are always artificially prepared.

Which of the following types of magnet(s) is/are used in cranes to lift heavy containers from ships?

Cylindrical magnet
Electromagnet
Horseshoe magnet
Bar magnet
Both 1 and 2

Unlike poles of a magnet ___________ each other.

attract
repel
first attract and then repel
heat up
none of these

What name is given to the rock used to help find the directions?

Magic rock
Way finder
Lodestone
Pole rock
Compass

The best way to magnetise a steel pin is by _________________.

heating it
putting it in water
hitting it with a magnet
stroking it with a magnet
none of these

What will happen, if we break a magnet from the middle?

A magnet will lose its magnetic power.
Both the pieces will become new magnet with N-S pole.
North and south poles will be separated.
Nothing will happen.
None of the above

Which of the following statements is/are true?

Poles are not exactly at ends but are slightly inside.
A magnet has three poles, two poles at the ends and one at the center.
A magnet poles can be isolated.
Opposite poles of a magnet attract each other.
All the above are true.

Magnetism is a kind of ______________.

electricity
gravity
matter
force
energy

A horse shoe magnet is powerful, what would happen if its shape is changed to a bar magnet?

It will become powerful.
It will lose its magnetic power due to striking.
The location of poles will be interchanged.
It will convert into simple piece of iron.
None of these

Which of the following is a magnetic material?

Brass
Copper
Nickle
Silver
All of the above

Strength of a magnet is _____________.

the maximum at the poles
the minimum at the poles
the maximum at the center
the minimum at the center
equal everywhere

The nerves in our body transmit messages as _______.

radiowaves
electrical impulses
electromagnetic waves
seismic waves
none of these

What name is given to the device that makes a strong magnet by passing electricity through a coil of wire wrapped around a block of iron?

Electric kettle
Crane
Solenoid
Transformer
None of the above

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