Question

A straight wire 0.10 m long carrying a current of 2.0 A is at right angles to a magnetic field.
The force on the wire is 0.04 N. What is the strength of the magnetic field?

Answer 1

As F = BIL sin α, we can obtain&
B = F/ ILsin α = 0.04/(2*0.1) = 0.2 T