You are given a 9V battery and two capacitors. The first capacitor has a value o

Question

You are given a 9V battery and two capacitors. The first capacitor has a value of C1 = 20 F and the second has a value of C2 = 50 F. If the two capacitors are placed in parallel, connected to the battery and completely charged...

a) What is the equivalent capacitance of the circuit? F

b) What is the value of the voltage across capacitor C1? V

c) What is the value of the voltage across capacitor C2? V

d) What is the value of the charge on capacitor C1? C

e) What is the value of the charge on capacitor C2? C

f) What is the value of the voltage across the battery? V

g) What is the value of the current through the battery? (Note: Think about how a capacitor physically works. It will help you figure out this question. Remember, the capacitors are completely charged.) A

Explanation / Answer

a) C = C1+C2 = 70F

b) 9V

c) 9V

d) Q1 = C1*V = 180C

e) Q2 = C2*V = 50*9 = 450 C

f) 9V

g) 0

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