In an LR series circuit connected to a dc source and a switch, the inductor gets 40% of its maximum current 1.8 s after the switch is closed at t = 0 s. What is the time constant of this circuit?
A)
0.80 s
B)
1.5 s
C)
2.5 s
D)
3.5 s
E)
5.5 s
D
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a.
1.0 A
b.
0.50 A
c.
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d.
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