At the equator, the earth's magnetic field is approximately horizontal, is directed toward the north, and has a value of 8 X 10-5 T.
(a) Estimate the emf induced between the top and bottom of a bullet shot horizontally at a target on the equator if the bullet is shot toward the east. Assume the bullet has a length of 1 cm and a diameter of 0.4 cm and is traveling at 300 m/s. Which is at higher potential: the top or bottom of the bullet?
(b) What is the emf if the bullet travels south?
(c) What is the emf induced between the front and back of the bullet for any horizontal velocity?