The current in a 20.0-mH inductor changes with time as /= 2.00t²-8.00t, where / is in amperes and it is in seconds. (a) Find the magnitude of the induced emf at t = 1.00 s. -80 x How does the emf of an inductor depend on the current? mV (b) Find the magnitude of the induced emf at t = 4.00 s. 160 mv (c) At what time is the emf zero? x Is the current through an inductor zero when the emf is zero? s Need Help? Watch It

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Chapter32: Inductance
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The current in a 20.0-mH inductor changes with time as/= 2.00t²-8.00t, where / is in amperes and it is in seconds.
(a) Find the magnitude of the induced emf at t = 1.00 s.
-80
How does the emf of an inductor depend on the current? mV
(b) Find the magnitude of the induced emf at t= 4.00 s.
160
mv
(c) At what time is the emf zero?
x
Is the current through an inductor zero when the emf is zero? s
Need Help? Watch It
Transcribed Image Text:The current in a 20.0-mH inductor changes with time as/= 2.00t²-8.00t, where / is in amperes and it is in seconds. (a) Find the magnitude of the induced emf at t = 1.00 s. -80 How does the emf of an inductor depend on the current? mV (b) Find the magnitude of the induced emf at t= 4.00 s. 160 mv (c) At what time is the emf zero? x Is the current through an inductor zero when the emf is zero? s Need Help? Watch It
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