# hw18 - Physics 21 Fall, 2008 Solution to HW-18 YF29-36 A...

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Unformatted text preview: Physics 21 Fall, 2008 Solution to HW-18 YF29-36 A parallel-plate air-filled capacitor is being charged. The circular plates have radius 4.00 cm, and at some time t , the conduction current in the wires is 0.287 A. (a) What is the displacement current i D in the air space be- tween the plates? (b) What is the rate dE/dt at which the electric field between the plates is changing? (c) What is the induced magnetic field between the plates at a distance of 2.03 cm from the axis? (d) What is the induced magnetic field between the plates at a distance of 1.10 cm from the axis? 30-27 An inductor with L = 2 . 30 H and a resistance of 7.80 Ω is connected to the terminals of a battery with an emf of 6.10 V and negligible internal resistance. (a) What is the power input to the inductor from the battery as a function of time t if the circuit is completed at t = 0? (b) What is the rate of dissipation of energy in the resistance of the inductor as a function of time t ? (c) What is the rate at which the energy of the magnetic field in the inductor is...
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## This note was uploaded on 02/09/2009 for the course PHYS 021 taught by Professor Hickman during the Fall '08 term at Lehigh University .

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