If a coil made of conducting wires is rotated between poles pieces of the permanent magnet. The motion will generated a current and this device is called

The pole pieces of the magnet used in a pivoted coil galvanometer are

If oxygen gas is introduced between the pole pieces of a magnet ________.

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of permanent magnet. Such that vecB is in plane of the coil. If due to a current I in the triangle, a torque tau acts on it, the side l of the triangel is:

A coil in the shape of an equilateral triangle of side l is suspended between the pole pieces of permanent magnet. Such that vecB is in plane of the coil. If due to a current I in the triangle, a torque tau acts on it, the side l of the triangel is: