A Metal Blade Spins at a Constant Rate of 5

A metal blade spins at a constant rate of 5.0 revolutions per second about a pivot through one end of the blade. This rotation occurs in a region where the component of the earth's magnetic field perpendicular to the blade is 30 μT. If the blade is 60 cm in length, what is the magnitude of the potential difference between its ends?

A) 0.24 mV
B) 0.20 mV
C) 0.17 mV
D) 0.27 mV
E) 0.34 mV