An emf of 15 V is applied in a circuit coil containing 5 H inductance and 10 Ω resistance. The ratio of currents at time t = ∞ and t = 1 s is

Question

An emf of 15 V is applied in a circuit coil containing 5 H inductance and 10 Ω resistance. The ratio of currents at time t = ∞ and t = 1 s is, e 2 e 2 - 1, 1 - e - 1, e - 1, none of these

MARKS App · Accepted Answer

Here, i = i 0 , at t = ∞ Let i be the current at t = 1 s From i = i 0 1 - e - R L t = i 0 1 - e - 10 5 × 1 = i 0 1 - 1 e 2 ∴ i 0 i = e 2 e 2 - 1

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