Science : Ch 13 – Magnetic Effects of Electric Current

An electron moves with a speed v along positive direction of the x-axis. If a magnetic feld B acts along the positive y-direction, then the force on the electron will act along:

Which of the subsequent is not attracted by a magnet:

Magnetic effect of current was identified by:

The nature of magnetic field line passing through the centre of current carrying circular loop is:

Direction of rotation of a coil in electric motor is intent by:

The instrument that use to direct electric current in the circuit is known as:

A D.C generator works on the theory of:

Overloading is caused to:

A coil of many circular turns of wire wrapped in the shape of a cylinder

The change in magnetic feld lines in a coil is the cause of induced electric current in it. Name the underlying phenomenon.

Commercial electric motors do not use

The phenomenon discovered by Faraday.

The deflection of the galvanometer becomes zero the moment the motion of

A device that can convert electrical energy into mechanical energy is

When a strong bar magnet is pushed into a coil of insulated copper wire connected to a galvanometer, we will observe a deflection in the galvanometer in