Which statement is true about the magnetic poles?
What is the direction of the magnetic field lines inside a bar magnet?
The presence of a magnetic field can be detected by a:
If the current in a wire which is placed perpendicular to a magnetic field, the force on the wire:
D.C motor converts:
Which part of D.C motor reverses the direction of current through the coil every half-cycle?
The direction of induced e.m.f. in a circuit is in accordance with the conservation of:
The step-up transformer:
The turn ratio of a transformer is 10. It means: