(Solved): A rectangular wire loop (shown in blue) of width w=12cm and height h=8cm is mounted on a low-frictio ...

A rectangular wire loop (shown in blue) of width

and height

is mounted on a low-friction cart on a cart track (the cart and cart track are not shown). A voltmeter (indicated by the circled

in the diagram) is connected rigidly in series with the loop, and moves with the loop. The loop moves through a region of uniform magnetic field (shaded) of magnitude 0.45 T in the

direction. The cart's speed is

in the

direction, as shown. Outside the shaded region, the magnetic field is nearly zero. Since the voltmeter is in series with the loop, and the resistance of the voltmeter is extremely high, essentially no current flows in the loop, and the potential difference displayed by the voltmeter is equal to the emf in the loop. The reading on the voltmeter is positive if the red connection is at a higher potential than the black connection. Location

is inside the right vertical wire in the lood. Part 1 Your answer is incorrect. What is the direction of the magnetic force on an electron in the wire at location

?

Hint Attempts: 1 of 4 used Part 2 What is the direction of the electric force (due to surface charge) on an electron in the wire at location C? Attempts: 0 of 4 used