The universal properties of all substances is
Which one of the following is a non-magnetic substance?
Due to the earth’s magnetic field, charged cosmic ray particles
Magnetic meridian is a
A compass which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It
At geomagnetic poles, there is no horizontal component of earth field and so compass needle may stay at any position.
Unlike poles repel. The repulsive magnetic force will not allow the like poles to get stuck.
For dynamo which one of the following statements is correct?
The current in the armature of a motor is reversed at every half cycle due to the action of a(n)
The current in a generator armature is AC because
In an electric motor, conversion takes place of