The electric current in a circular coil of two turns produced a magnetic induction of 0.2 T at its centre. The coil is unwound and then rewound into a circular coil of four turns. If same current flows in the coil, the magnetic induction at the centre of the coil now is

The current passing through a circular coil of two rurns produces a magnetic firld of 4 mu T as its centre. The coil is then rewound, so as to have four turns and the current passing through it is doubled. What is the new magnetic firld at the centre of the coil ?

A current passing through a circular coil of two turns produces a magnetic field B as its centr. The coil is then rewound so as to have four turns and the same current is passed through it. The magnetic field at its centre now is

A current passing through a circular coil of two turns produces a magnetic field B at its centre. The coil is then rewound so as to have four turns and the same current is passed through it. The magnetic field at its centre now is

Current 'i' is flowing in heaxagonal coil of side a. The magnetic induction at the centre of the coil will be

A circular coil of 50 turns and radius 0.2 cm carries a current of 12 A. Find magnetic field at the centre of the coil.

When a long wire carrying a steady current is best into a circular coil of one turn, the magnetic induction at its centre is B. When the same wire carrying the same current is bent into a circular coil of one turn, the magnetic induction at its centre is B. when the same wire carrying the same current is bent to form a circular coil of a turns of a smaller radius, the magnetic induction at the centre will be