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
Choose the odd one out.
Bar magnet
Magnetite
Ring magnet
Horse-shoe magnet
Pick the odd one out
Iron nail
Pins
Rubber tube
Needle
Magnets
Are used in dynamos and generators
Are used in the construction of toys
Are utilized by making magnetic compass
Possess all the above three properties
The region around a magnet where its influence can be felt is called its
Magnetic field
Magnetic lines of force
Magnetic poles
Magnetic axis
Which of the following is not a magnetic substance ?
Rubber
Iron
Cobalt
Nickel
Which of the following property of magnet is used in electromagnetic train?
Attractive property
Repulsive property
Magnetic attraction and repulsion
Directive property
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 .
Odd - one out 1.Steel 2.Cobalt 3.Alnico 4.Soft iron
1
2
3
4
The poles of a magnet are
N - E
E - W
N - S
W- S
