In a long straight wire, what current is required to exert a 1.0μN force on a 1.0μC charge moving at 1.5×106m/s parallel to the wire at a distance of 0.35m from the wire?

Current in the wire is given as

Explanation:

magnetic field due to long current carrying wire is given as

so we have magnetic force on moving charge is given as

so we have

so we have

explanation:

newton's third law, for every action there is an equal and opposite reaction.

think its the third option