Science : Ch 13 – Magnetic Effects of Electric Current

For a current in a long straight solenoid N and S-poles are created at the two ends. Among the subsequent declaration , the incorrect declaration is:

The magnetic feld inside a long straight solenoid carrying current is:

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

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 magnet is moved towards a coil (i) quickly (ii) slowly. The induced potential difference:

A D.C generator works on the theory of:

The current which is created due to the relative motion of coil or magnet

Example of permanent magnet is

Which of the following is not attracted by a magnet:

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 feld inside a long straight solenoid carrying current is

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

A device that can convert electrical energy into mechanical energy is

You are holding the current-carrying wire in your right hand so that your thumb points in the direction of current, then the direction in which your fingers encircle the wire will give the direction of the magnetic feld lines around the wire.explain