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Capacitor Help

  • Thread starter fasegovia
  • Start date
  • #1
2
0

Homework Statement


A fully charged 10e-4 F capacitor has a potential difference across it of 9Volts. It is then connected to a resistor of 10 ohms. How long will it take for the current through the resistor to decrease to 1/2 of its initial value?


Homework Equations





The Attempt at a Solution


I know the answer is 6.9e-4 secs... but I want to know how it was done :/ Anyone?
 

Answers and Replies

  • #2
diazona
Homework Helper
2,175
6
What formulas do you know (or can you look up) that involve a circuit with a resistor and a capacitor?
 
  • #3
2
0
Well I have..
V = IR
I = |q|nAv
v = uE

R = L |q|nAu
 

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