A Conducting Bar of Length L Rotates with a Constant

Multiple Choice

A conducting bar of length L rotates with a constant angular speed of +2.0 rad/s about a pivot P at one end, as shown. A uniform magnetic field (magnitude = 0.20 T) is directed into the paper. If L = 0.40 m, what is the potential difference, V_A − V_P?

A) −12 mV
B) +8.0 mV
C) −8.0 mV
D) +12 mV
E) −16 mV