How much current should be passed in a long wire so that the magnetic field at a distance of 20 cm from the wire is 0*5 xx 10...

A long vertical wire in which a current is flowing produces a neutral point with the earth's magnetic field at a distance of 5 cm from the wire. If the horizontal component of the earth's magnetic induction is 0.18 gauss, then of the wire is

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 ?

A vertical wire in which current is flowing produces a neutral point with the earth's horizontal field at a distance of 5 cm from the wire in air . What is current , if B_(H) = 0.18 xx 10^(-4) T ?

Calculate the value of magnetic field at a distance of 2 cm from a very long straight wire carrying a current 5 A

A long straight wire , lying in horizontal plane is carrying 20 A of current from east to west. What is the magnetic field due to the wire at a point (i) 10 cm south from the wire and (ii) 20 cm upward in its vertical plane?