Magnetism Online Test

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Magnetism

Description: Magnetism
Number of Questions: 15
Created by: Jayanti Mahajan
Tags: Magnetism Fundamentals of Magnetism

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Which of the following is the most magnetic?

Ebonite
Magnetite
Cobalt
Nickel
None of these

Which of the following is the surest test of magnetism?

Attraction
Rotation
Repulsion
None of these
All of these

To which direction does the North end of a freely suspended magnet point?

Geographical North
Geographical South
Geographical East
Geographical West
None of these

Which of the following cannot be used to make a magnet?

Cobalt
Iron
Ebonite
Steel
None of these

Which of the following results in the loss of magnetism of a magnet?

Keeping in a box
Heating
Hammering
Both (2) & (3)
None of these

Which of the following gets demagnetized when a powerful magnet is kept near it?

Plastic Ruler
Compact disc
Glass tumbler
Wood
None of these

What happens when unlike poles of a magnet are brought near each other?

Attract
Repel
Rotate clockwise
Rotate anticlockwise
None of these

Which of the following devices is used by pilots & navigators to find the direction?

Barometer
Thermometer
Magnetic compass
Magnetic pen
None of these

The direction of the force on a current carrying wire in a magnetic field is described by which of the following?

Perpendicular to the current
Perpendicular to the magnetic field
Both (1) & (2) are valid
Neither (1) nor (2) is valid
None of these

What will happen, if a magnet is cut into two pieces of equal length?

Both pieces will lose their magnetism.
One piece will act as North Pole and the other as South Pole.
Both pieces will behave as complete magnets.
One of the pieces will lose its magnetism.

When a bar magnet immersed in a heap of iron fillings is taken out, it is observed that iron fillings stick to the surface of the bar magnet. The iron fillings would be observed to

stick uniformly throughout the surface of the bar magnet
stick randomly on the surface of bar magnet
have maximum concentration at the two ends of the bar magnet
have maximum concentration slightly away from the two ends of the bar magnet

When an electric current flows through a coil and an iron nail is placed inside a coil it behaves like a magnet.When electric current stops flowing through the coil what effect does an iron nail show?

It behaves like a magnet
It will lose its magnetism
It will start rotating clockwise
It will start rotating anti clockwise
None of these

A charged particle moves across a constant magnetic field. What is the effect of the magnetic field on this particle?

It causes particle to disintegrate.
It causes particle to accelerate.
The particle remains stationary.
Both (1) and (2) can be possible.
None of these

______________ precedes attraction in magnetism.

Induction
Conduction
Heating
Cooling
None of these

If a charged body attracts another body, the charge on the other body

must be negative
must be positive
must be zero
may be negative or positive or zero

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