Consider a Boeing 777-200 airplane of wing span 60.93 m cruising horizontally at Mach 0.785 (about 828 km/h) due north in a region where the earth's magnetic field is .98*10<-5 T and pints north with a dip angle of 55.0 degrees.
(a) Find the emf induced across its wing.
(b) Which end of the wing is positive? EXPLAIN WITH DIAGRAM!