Calculate the magnetic field strength when a current of 3A flows in a wire 2.5m long and produce a force of 15N

Answer:- The magnetic field strength is 2N/Am

The Lorentz law indicates that the force produced on a present carrying wire located in the magnetic field is the produce of its length, current and magnetic field strength. Consequently, we write

F= Bil

Replacing the known values in above relation, we get

15 B x 3 x 2.5 => B = 2N/Am

Consequently, the magnetic field strength is found to be 2N/Am