When we stop the current flow through an electromagnet, what happen?
It becomes an ordinary wire
It becomes a permanent magnet
It becomes an artificial magnet
It becomes an insulator
In which device a coil of conducting wire is rotated by some mechanical means in between the poles of a magnet?
Electric motor
Electric door bell
Dynamo
Transformer
Which of the following exist around a moving electron?
Only electric field
Only magnetic field
Both magnetic and electric field
Either a magnetic or electric field at a time
Which of the following is a non-magnetic material?
Cobalt
Nickel
Iron
Brass
An electric motor converts electrical energy to
heat energy
thermal energy
mechanical energy
rotational energy
A solenoid produces
a strong magnetic field
a weak magnetic field
equal to Earth's magnetic field
a permanent magnetic field
Electromagnet is produced by
permanent magnet
current
magnetic moment
voltage
In which direction the magnetic compass pointer always gets attracted?
North
North - East
South
South - West
The angle between the Earth's magnetic field and the Earth's spin axis is
23.3 °
10 °
11 °
13.5°
No monopole exist for,
bar magnets
horse shoe magnets
compass needle
all kinds of magnets
