coil of 1 turns made by a constant length current carrying wire. If number of turns makes 2 then change in magnetic field produced at its centre :-

A coil of 50 turns and 4cm radius carries 2A current then magnetic field at its centre is :- ?

A circular coil carrying a current I has radius R and number of turns N. If all the three, i.e., the current I, radius R and number of turns N are doubled, then, magnetic, field at its centre becomes:

Two circular coils are made of two identical wires of same length and carry same current. If the number of turns of the two coils are 4 and 2, then the ratio of magnetic induction at the centres will be

Two circular coils are made of two identical wires of same length and carry same current. If the number of turns of the two coils are 4 and 2, then the ratio of magnetic induction at the centres will be

A current carrying wire AB of the length L is turned along a circle, as shown in figure. The magnetic field at the centre O.

A current carrying wire AB of the length L is turned along a circle, as shown in figure. The magnetic field at the centre O.

A current carrying wire AB of the length L is turned along a circle, as shown in figure. The magnetic field at the centre O.

A conducting wire of length l is turned in the form of a circular coil and a current I is passed through it. For the torque, due to magnetic field produced at its centre, to be maximum, the number of turns in the coil will be