A jet plane is travelling towards west at a speed of 1800 km/h. What is the voltage difference developed between the ends of the wing having a span of 25 m, if the Earth’s magnetic field at the location has a magnitude of 5 x 10⁻⁴ T and the dip angle is 30°.

Speed of the jet plane, v = 1800 km/h = 500 m/s

Wing span of jet plane, l = 25 m

Earth’s magnetic field strength, B = 5.0 x 10^-4 T

Angle of dip, δ = 30°

Vertical component of Earth’s magnetic field,

Bv = B sin δ = 5 x 10^_4sin 30°

= 2.5 x 10^-4 T

Voltage difference between the ends of the wing can be calculated as: e = (Bv) x l x v

= 2.5 x 10⁻⁴x 25 x 500 = 3.125 V

Hence, the voltage difference developed between the ends of the wings is 3.125 V.