Science : Ch 13 – Magnetic Effects of Electric Current

A current-carrying conductor is clench in totally vertical direction. In order to produce a clockwise magnetic feld around the conductor, the current should passed in the conductor:

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:

The magnetic field lines:

Relative strength of magnetic field at a point in the space adjoining the magnet is shown by the:

A soft iron bar is introduced inside the current carrying solenoid. The magnetic field inside the solenoid:

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

In electric motor, to make the coil rotating constantly in the identical direction, current is reversed in the coil after every half rotation by a device called:

A D.C generator works on the theory of:

Overloading is caused to:

The name of the effect being produced by the moving magnet

The commercial motors use a soft iron core on which the coil is wound because

Example of permanent magnet is

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