Ceramic magnets are used in:
Dynamo
Generator
Computer
Commutator
Magnet A can hold three steel paperclips; Magnet B can hold five. Which is the strongest?
Magnet A
Magnet B
They are both equally strong
None of these
Which material is used to make a temporary magnet?
Steel
Nickel
Cobalt
Soft iron
Which of the following character is wrong about a magnet ?
Magnetic poles always exist in pairs
like poles attract each others
Magnetic lines of force never intersect
It is impossible to obtain a piece of magnets having only one magnetic pole .
In which direction do the field lines go around a magnet?
From south to north
It's different for every magnet
Clockwise
From north to south
Where are the field lines most concentrated around a bar magnet?
At the centre
At both poles
At the South Pole
At the North Pole
What advantage does an electromagnet have over a permanent magnet?
A permanent magnet cannot be used to pick up nickel.
An electromagnet can be used for picking up more metals.
An electromagnet can be switched off.
An electromagnet is lighter.
Why will a magnet not attract pieces of paper?
Because paper is not magnetic
Because paper is not sticky
Because paper is not strong
Artificial magnets can be
Temporary magnets
Permanent magnets
Both a and b
