Recent content by Necraz

Hadn't even considered that the density equation could be wrong - I figured the mistake was somewhere in the following page of calculus. Thanks for pointing that out, that must be why the answers are incorrect. Realized this and got the answer correct just prior to returning here to mark this...

Field: \lambda = \frac{q}{L} = \frac{q}{2 \pi r} = \frac{dq}{ds} ds = r d\theta dq = \lambda r d\theta dE = \frac{cos\theta dq}{4 \pi \epsilon_0 r^2} E = \int_{\frac{-\phi}{2}}^{\frac{\phi}{2}}{\frac{\lambda cos\theta d\theta}{4 \pi \epsilon_0 r}} = \frac{\lambda(sin\frac{\phi}{2} -...

[SOLVED] Voltage from Ring of Charge Homework Statement A plastic rod has been bent into a circle of radius R = 6.40 cm. It has a charge Q1 = +2.40 pC uniformly distributed along one-quarter of its circumference and a charge Q2 = -6Q1 uniformly distributed along the rest of the circumference...