Question 1:

a) In an LR circuit, the current falls to 10 % of its initial value in 0.01 s. If I = 7mH, what is R? b) In an LR circuit, the current rises to 50 % of its final value in 0.02 s. If R = 20 0, what is L? mHIn an LR circuit, I = 250 mH and R = 25 0. The switch is closed at t = 0. a) How long does it take to rise to 60% of its final value? ms b) What percentage of the final current is attained in 2 time constants?A resistor R = 60 0 is in series with an inductor _ = 3.4mH and a 200 V battery. The switch is closed at t = 0. At what time will the power loss in R equal the rate at which energy is being stored in L? ms