In a Region of Space Where the Magnetic Field of the Earth

Multiple Choice

In a region of space where the magnetic field of the earth has a magnitude of 80 μT and is directed 30° below the horizontal, a 50-cm length of wire oriented horizontally along an east-west direction is moved horizontally to the south with a speed of 20 m/s. What is the magnitude of the induced potential difference between the ends of this wire?

A) 0.45 mV
B) 0.35 mV
C) 0.30 mV
D) 0.40 mV
E) 0.69 mV