A magnetic field produced by a coil of wire is much stronger than that produced by the same wire when it is stretched in a straight line.

When a wire is twisted, the strain produced in it is

The magnetic field produced around a straight line wire when current flows through it is

Magnetic field is produced by the flow of current in a straight wire. This phenomenon is based on-

When current is passed through a circular wire prepared from a conducting material, the magnetic field produced at its centre is B. Now a loop having two turns is prepared from the same wire and the same current is passed through it. The magnetic field at its centre will be :

Consider the magnetic field produced by a finitely long current carrying wire .

When we pluck the wire of a sitar, the waves produced in the wire are

In a tangent galvanometer, the magnetic induction produced by the coil of wire situated in the magnetic meridian is found to be equal to the horizontal component of the earth's magnetic field. The deflection produced in it will be

A current carrying wire is bent into the shape of a square coil. The magnetic field produced at the entre of coil by one arm BC is B. Then the resultant magnetic field at the centre due to all the arms will be-

Draw the magnetic field lines due to a straight wire carrying current.