a jet plane is travelling west at 450 ms-1. if the horizontal component of earth's magnetic field at that place is 4 * 10-4 Tesla and the angle of dip is 30 degrees, find the emf induced between the ends of the wings having span of 30 m.
let velocity of plane v = 450 m/s.
wingspan l = 30 m.
mag. Field B = 4 × 10-4 T
angle of dip α = 30∙
therefore vertical component Bv = B sin α
= 4 × 10-4 × sin 30∙
Bv = 2 × 10-4 T
Motional EMF ε = Bv l v
= 2 × 10-4 × 30 × 450
= 27000 × 10-4
ε = 2.7 Volts