23.3 Motional Emf

(a) A jet airplane with a 75.0 m wingspan is flying at 280 m/s. What emf is induced between wing tips if the vertical component of the Earth’s field is $3 . \text{00} \times \text{10}^{- 5} \text{T}$? (b) Is an emf of this magnitude likely to have any consequences? Explain.

At what speed must the sliding rod in the figure move to produce an emf of 1.00 V in a 1.50 T field, given the rod’s length is 30.0 cm?

The Tethered Satellite discussed in this module is producing 5.00 kV, and a current of 10.0 A flows. (a) What magnetic drag force does this produce if the system is moving at 7.80 km/s? (b) How much kinetic energy is removed from the system in 1.00 h, neglecting any change in altitude or velocity during that time? (c) What is the change in velocity if the mass of the system is 100,000 kg? (d) Di…