a) A 3500 resistor is joined in series with a90 F capacitor. What is the capacit
ID: 1666639 • Letter: A
Question
a) A 3500 resistor is joined in series with a90 F capacitor.What is the capacitive time constant of this combination? b) If a 24.0 volt battery is suddenly connectedacross this RC combination, how long will it take for the capacitorvoltage to reach 23.0 volt? How would I start this? Any help would be GREAT! a) A 3500 resistor is joined in series with a90 F capacitor.
What is the capacitive time constant of this combination? b) If a 24.0 volt battery is suddenly connectedacross this RC combination, how long will it take for the capacitorvoltage to reach 23.0 volt? How would I start this? Any help would be GREAT!
Explanation / Answer
a)The capative time constant is T=R*C=0,315(sec) b) In a RC circuit. the voltage across the capacitor. U=E*(1-e^t/T) with T be the capactive time constant. so 23=24*(1-e^-t/T) e^-t/T=1/24 so t/T=-ln(1/24)=3,17 so t=0,315*3,17=1s
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