The diagram below depicts an RC-circuit where C = 7.80 F , R 1 = 15.0 , R 2 = 26
ID: 2058335 • Letter: T
Question
The diagram below depicts an RC-circuit where C = 7.80 F, R1 = 15.0 , R2 = 26.5 , and Vo = 25.2 V. What is the current through R1 immediately after the switch S is closed?
What is the current through R2 immediately after the switch S is closed?
What is the current charging the plates of the capacitor immediately after the switch S is closed?
What is the current through R1 after the switch S has been closed for a very long time? Assume that the battery does not go dead.
What is the current through R2 after the switch S has been closed for a very long time? Assume that the battery does not go dead.
Explanation / Answer
Solution:
a) As switch is closed ; capacitor will behave short circuit therefore current = Vo /R1
b) The current through R2 immediately after the switch S is closed will be zero sice it will get shorted
c) Immediately after switch is closed ; the current charging the plates of capacitor will be: Vo/R1
d) the current through R1 after the switch S has been closed for a very long time
will be: Vo/(R1+R2)
e) the current through R2 after the switch S has been closed for a very long time
will be: Vo/(R1+R2)