{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# What is the capacitance c of this capacitor q c v

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

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: tructed from two BB conducting cylindrical shells of radii a1, a2, a3, and a4 and length L (L >> ai). What is the capacitance C of this capacitor ? Q C≡ V Where is +Q on outer conductor located? (A) at r=a4 (B) at r=a3 (C) both surfaces (A) (B) (C) Why? Gauss’ law: ∫ E ⋅ dA = (D) throughout shell Qenclosed εo Qenclosed = 0 We know that E = 0 in conductor (between a3 and a4) Qenclosed = 0 +Q must be on inside surface (a3), so that Qenclosed = + Q – Q = 0 Physics 212 Lecture 7, Slide 22 22 Calculation cross-section +Q + + + + + − − − − − − − − − − − − + −−− −−− −−− −−− − − − − + −+ − − − −+ − − − a2 a1 + a4 a3 -Q −+ − + − − + + − − metal − − − + + +++ metal A capacitor is constructed from two BB conducting cylindrical shells of radii a1, a2, a3, and a4 and length L (L >> ai). What is the capacitance C of this capacitor ? Q C≡ V Where is -Q on inner conductor located? (A) at r=a2 (B) at r=a1 (C) both surfaces (A) (B) (C) Why? Gauss’ law: ∫ E ⋅ dA = (D) throughout shell Qenclosed εo Qenclosed = 0 We know that E = 0 in conductor (between a1 and a2) Qenclosed = 0 +Q mu...
View Full Document

{[ snackBarMessage ]}