1. A long straight conducting wire of length L and mass m carries a current I. The conductor is near the surface of the earth, in a uniform magnetic field of magnitude B, as shown in the diagram. (This is a “physics” wire. It magically has a current in it without being connected to anything else.)
For what value of I will the net force on the conducting wire be zero? I
 B

2. The conductor is near the surface of the earth.
For what value of I will the net force on the conducting wire be zero?
The conductor is near the surface of the earth.
For what value of I will the net force on the conducting wire be zero? FB I
 B Fg
for net force to be zero: