An infinite long copper wire of diameter 3.2 mm carries a current i. The maximum magnetic field due to this wire is `2 × 10^(-3)` T. The value of the current i is

A copper wire of diameter 1.6 mm carries a current of 20A. Find the maximum magnitude of the magnetic field (vec B)due to this current.

A current carrying metal wire of diameter 2 mm produces a maxiumum magnetic field of magnitude 4xx10^(-3) T. What is the current in the wire ?

A straight wilre of diameter 0.5 mm carrying a current 2A is replaced by another wire of diameter 1 mm carrying the same current. The strength of magnetic field at a distance 2 m away from the centre is

A straight wire of diameter 0.5mm carrying a current 2A is replaced by another wire of diameter I mm carrying the saine current. The magnetic induction at a distance 2m away from the centre is :

A straight wire of diameter 1 mm carrying a current of 2 amperes is replaced by another wire of 2 mm diameter. the strength of the magnetic field far away is

A very long bar magnet is placed with its north pole coinciding with the centre of a circular loop carrying an electric current. i . The magnetic field due to the magnet at a point on the periphery of the wire is B . The radius of the loop is a . The force on the wire is

A straight wire of diameter 0.4 mm carrying a current of 2A is replaced by another wire of 0.8 mm diameter and carrying the same current. The magnetic field at the same distance from the wire is

A long wire having a semi-circular loop of radius r carries a current I, as shown in Fig. Find the magnetic field due to entire wire.

A long copper wire carries a current of I ampere. Calculate the magnetic flux per meter of the wire for a plane surface S inside the wire as shown in Fig.