A coil of inductance `1 H` and resistance `10Omega` is connected to a resistanceless battery of emf `50 V` at time `t=0`. Calculate the ratio of rthe rate which magnetic energy is stored in the coil to the rate at which energy is supplied by the battery at `t=0.1s`.A. `e`B. `(1)/(e-1)`C. `1-(1)/(e)`D. `(1)/(e)`

A coil of inductance `1 H` and resistance `10Omega` is connected to a

1.	A coil of inductance `1 H` and resistance `10Omega` is connected to a resistanceless battery of emf `50 V` at time `t=0`. Calculate the ratio of rthe rate which magnetic energy is stored in the coil to the rate at which energy is supplied by the battery at `t=0.1s`.A. `e`B. `(1)/(e-1)`C. `1-(1)/(e)`D. `(1)/(e)`
Answer» `((dU)/(dt))/(p) = (1)/(2)(L(2i)(di)/(dt))/(Vi) = (L)/(V)i_(0)(R )/(L)e^(-(R)/(L)t) = (R )/(V)((V)/(R ))e^(-1) = (1)/(e)`

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