Aseries lr circuit contains an emf source of 14 v having no internal resistance, a resistor, a 34 h inductor having no appreciable resistance, and a switch. if the em across the inductor is 80% of its maximum value 4.0 s after the switch is closed, what is the resistance of the resistor? a) 1.9 ω b) 1.50 ω c) 14 ω d) 5.0 ω

(a) 1.9 ohm

Explanation:

We have given voltage across LR circuit

Inductance L = 34 Henry

Time t = 4 sec

It is given that emf across the inductor is 80% of maximum value in 4 sec

The voltage across RL circuit is given by

, here is time constant which is for RL circuit

Now according to question

We know that

R = 1.9 ohm

So option (a) is correct

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.