A 20-Cm Length of Wire Is Held Along an East-West

Multiple Choice

A 20-cm length of wire is held along an east-west direction and moved horizontally to the north with a speed of 3.0 m/s in a region where the magnetic field of the earth is 60 μT directed 30° below the horizontal. What is the magnitude of the potential difference between the ends of the wire?

A) 36 μV
B) 18 μV
C) 31 μV
D) 24 μV
E) 21 μV