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An inductor coil carries a steady state...

An inductor coil carries a steady state current of 2.0 A when connected across an ideal battery of emf 4.0 V. if its inductance is 1.0 H, find the time constant of the circuit.

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here`i=2A,E=4V, L=1H`
`:. R=(E/i)=(4/2)=2 Omega`
`i=L/R=1/2=0.5A`.
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