Questions
The current in an LR circuit builds up to of its steady state value in 4 s. The time constant of this circuit is
detailed solution
Correct option is B
We know that i=io1-e-RtL or 34io=io1-e-t/τ (where τ=LR= time constant 34=1-e-t/τ or e-t/τ=1-34=14et/τ=4 or tτ=ln 4⇒τ=tln4=42ln2⇒τ=2ln2 sTalk to our academic expert!
Similar Questions
In the circuit shown, sliding contact is moving with uniform velocity towards right. Its value at some instance is . The current in the circuit at this instant of time will be
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