Motional Emf: a 50-Cm Wire Placed in an East-West Direction

Multiple Choice

Motional emf: A 50-cm wire placed in an east-west direction is moved horizontally to the north with a speed of 2.0 m/s. The horizontal component of the earth's magnetic field at that location is 25 μT toward the north and the vertical component is 50μT downward. What is the emf induced between the ends of the wire?

A) 10 µV
B) 20 µV
C) 30 µV
D) 40 µV
E) 50 µV