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An LR circuit has L = 1.0 H R =20 Omeg...

An LR circuit has L = 1.0 H `R =20 Omega`. It is connected across an emf of `2.0 V at t=0`. Find `di/dt at (a) t =100ms, (b) t =200 ms and (c )t = 1.0 s`.

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