An inductor used in a dc power supply has an inductance of, Ask an Expert

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Q1. A jetliner can fly 5.3 hours on a full load of fuel. Without any wind it flies at a speed of 2.50 x 10^2 m/s. The plane is to make a round-trip by heading due west for the certain distance, turning around, and then heading due east for the return trip. All through the entire flight, however, the plane encounters a 58.40 m/s wind from the jet stream, which blows from west to east. What is the maximum distance that the plane can travel due west and just being able to return home?

Q2. An inductor used in a dc power supply has an inductance of 13.0 H and a resistance of 230 Omega. It carries a current of 0.210 A. What is the energy stored in the magnetic field? At what rate is thermal energy developed in the inductor? Does your reply mean that the magnetic field energy is decreasing with time?

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