Discussion Quiz 6 Solution

It is surrounded by a hollow conducting cylinder of

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: /ε0. You must find the electric potential to find the capacitance ) 2) Find the equivalent capacitance of the above configuration. If the voltage across C1 is 3V, find the charge on C1 and C4. 1) From Gauss’s Law, the electric field is E = λ/2πε0r So the electric potential difference between the surfaces (r = a and r = b) is V =(λ/2πε0)ln(b/a) Going back to the definition of capacitance C = Q/V We plug in the voltage to get C = 2πε0L/ln(b/a) 2) Remembering the rules for adding capacitors: Series: C23 = (1/C2 + 1/C3)^- 1 = C2C3/(C2+C3) Parallel: Cnet = C1 + C23 + C4 = C1 + C4 + C2C3/(C2+C3) To find the charge on C1, we go back to the definition of capacitance. C = Q/V → Q = VC So the charge on each capacitor is just Q1 = 3VC1 Q2 = 3VC2...
View Full Document

Ask a homework question - tutors are online