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
The space where the magnetic power felt is its magnetic
poles
field
axis
strength
What is the naturally occuring magnets?
Soft Iron
Magnetite
Manganese
Boaxite
In which direction the magnetic compass pointer always gets attracted?
North
North - East
South
South - West
Magnetic force is a
contact force
non-contact force
muscular force
frictional force
Which device can be stepped up or stepped down the alternating current?
Electrical motor
All the above
A dynamo produces
electric current
constant voltage
magnetic field
electric field
An electric motor converts electrical energy to
heat energy
thermal energy
mechanical energy
rotational energy
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
The magnetic field of the Earth is similar to that of a
compass
bar magnet
horse shoe magnet
All of above