Artificial magnets can be
Temporary magnets
Permanent magnets
Both a and b
None of these
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
Which pole of a magnet in a compass points north?
Neutral pole
South Pole
North Pole
Both 1 and 3
Electro magnets are used in:
Ammeter
Volt meter
Galvanometer
All of these
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 .
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.
Which of the following is an Artificial magnets?
Bar magnet
Horse shoe magnet
U-Shaped magnet
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