A rectangular loop of wire with dimensions 180 cm by 900 cm

A rectangular loop of wire with dimensions 1.80 cm by 9.00 cm and resistance 0.800 is being pulled to the right out of a region of uniform magnetic field. The magnetic field has magnitude 2.60 T and is directed into the plane of

3.00 m/s and it is still partially in the field region, what is the magnitude of the force that the magnetic field exerts on the loop?

What is the direction of the force that the magnetic field exerts on the loop?

Solution

F_B = I L B = v B² L² / r

= (3 * 2.60² * 0.018²) / (0.800)

= 0.0082 N