Question

An

L

=

59.0

cm

wire is moving to the right at a speed of

v

=

7.30

m/s

across two parallel wire rails that are connected on the left side, as shown in the figure. The whole apparatus is immersed in a uniform magnetic field that has a magnitude of

B

=

0.790

T

and is directed into the screen.

What is the emf

E

induced in the wire?

Region of magnetic field pointing into the screen. A U shaped wire lies on its side, such that the opening of the U points to the right. The length of the segment connecting the upper and lower horizontal branches of the U is L. A separate wire of length L connects the upper and lower branches of the U shaped wire and moves to the right at speed v.

E

=

V

The induced emf causes a current to flow in the circuit formed by the moving wire and the rails.

In which direction does the current flow around the circuit?

clockwise

counterclockwise

If the moving wire and the rails have a combined total resistance of

1.35

Ω

, what applied force

F

would be required to keep the wire moving at the given velocity? Assume that there is no friction between the moving wire and the rails.

F

=

N

Answer 1