HW3Solutions

HW3Solutions - SOLUTIONS HW3: Q22-14) The total charge that...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

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

Unformatted text preview: SOLUTIONS HW3: Q22-14) The total charge that is enclosed in case (a) is +1.0 m C 2.0 m C = -1 m C, in case (b) it is zero (as object 3 is neutral). Thus, using Gausss law: 6 10 . 1 C Q encl E = = in case (a) and zero in case (b). Q23-6) If V = 0 at a point in space, then the electric field does not have to be zero, even if V E = r . Remember, you take the derivative first, then you evaluate it at that point. Example: V(x) = x is zero at x = 0, but E(x) = -dV(x)/dx = -1 is not zero at x = 0. If E = 0 at a point in space, then the potential V does not have to be zero at that point. Example: E(x) = 1-x is zero at x = 1. V = V0 + x x 2 = V0 + at x = 1 does not have to be zero as we can chose V0 to fulfill our boundary condition. Q23-18) If the electric field is uniform, the integral will simplify to E L, where L is the distance between two points, and the potential difference between these two points is E L. If we choose V = 0 at L = 0, then the potential increases linearly with increasing distance L. If V is uniform in a region of space, V = V0 = constant and V E = r =0. Q24-6) The electrons flow from the negative terminal of the battery to one plate of the capacitor. At the same time, electrons flow from the second plate to the positive terminal of the battery. This will still be true of the two conductors have different terminal of the battery....
View Full Document

This note was uploaded on 04/07/2008 for the course PHY 113 taught by Professor Jordan during the Spring '08 term at Rochester.

Page1 / 3

HW3Solutions - SOLUTIONS HW3: Q22-14) The total charge that...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online