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A 390 mH inductor and a resistor are connected with a switch to a 17 V battery as shown in the figure. After the switch is thrown to "a" for a very long time, the
currect passing through the inductor becomes 5 A
S
ele
L.
R
(a) Find the resistance of the resistor.
R =
Ω
(b) At t = 0, the switch is quickly thrown from "a" to "b". What is the power dissipated by the resistor at t = 70 ms?
P =
W

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