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 increases,
the force on the wire

A D.C motor converts

Which part of a 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 conservation of

The step-up transformer

The turn ratios of a transformer is10. It means