Magnets lose their properties if they are
heated
dropped from a height
hit with a hammer
all the above
Which of the following is not a magnetic substance ?
Rubber
Iron
Cobalt
Nickel
Which of the following is a natural magnet?
Bar magnet
Ring magnet
Magnetite
Horseshoe magnet
Pick the odd one out
Iron nail
Pins
Rubber tube
Needle
Odd - one out 1.Steel 2.Cobalt 3.Alnico 4.Soft iron
1
2
3
4
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 magnet having only one magnetic pole .
Which one of the following is used to find the direction of magnetic fields?
Compass
Magnet
Ammeter
Voltmeter
A freely suspended magnet come to rest always in the
North- south direction
North-west direction
North - east direction
East - west direction
Magnetic lines of force travel from
South pole of the magnet to its north pole
North pole of the magnet to its south pole
Both direction
Cannot be determine.
The strength of an electromagnet depends on
The amount of current passing though coil
The number of turns of the coil
Both a and b
The thickness of the soft iron which is used to make a magnet
