Question

190 cm long wire of mass 50 gram carries a current of 10 ampere is placed over two parallel rails a magnetic field of magnitude 0.3 Tesla actor perpendicular to the length of the wire under the action of magnetic force it starts from rest with with with the speed of the wire after travelling a distance of 10cm ​

Answer 1

Answer:

A long straight wire carrying a current of 30 A is placed in an external uniform magnetic field of induction 4×10

−4

T. The magnetic field is acting parallel to the direction of current. The magnitude of the resultant magnetic induction in tesla at a point 2.0 cm away from the wire is (μ

0

=4π×10

−7

H/m)