In an LR Series Circuit Connected to a Dc Source

question 35

Multiple Choice

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

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