20 amps of electric current is flowing in a long straight wire. A point located 10 cm away from the wire...

An electric current passes through a long straight copper wire. At a distance of 5 cm from the straight wire, the magnetic field is B. What is the magnetic field at a distance of 20 cm from the wire ?

An electric current passes through a long straight wire. At a distance 5 cm from the wire the magnetic field is B . The field at 20 cm from the wire would be

1m long wire is folded in form of a circular coil and 100 mA electric current is flowing in it, then magnetic field at a point 1m away from its centre on its axis

What current must flow in an infinitely long straight wire to produce a magnetic field of 4xx10^5T at 8cm away from the wire?

A long straight wire carrying a current of 20A is placed in an external uniform magnetic field of 3xx10^-4T parallel to the current. Find the magnitude of resultant field at a point 2*0cm away from the wire.