1. an inductor is connected to the terminals of a battery that has an emf of 12.0v and negligible internal resistance. the current is 4.80ma at 0.745 ms after the connections is completed. after a long time the current is 6.40 ma. what is a) the resistance r of the inductor? b) the inductance l of the inductor?

(a) Resistance will be 2500 ohm

(b) Inductance will be 0 Henry

Explanation:

We have given emf of the battery V = 12 volt

Current at time t = 0.745 sec is 4.80 mA

After a long time current is 6.40 mA

After a long time means time tends to infinite

At infinite time inductor behaves as short circuit, so there is only resistance in the circuit

So resistance

Current at time in inductive circuit is given by

L = 0 Henry

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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