Theory and Examples

The sum of the series To find the sum of this series, express 1/(1 – x) as a geometric series, differentiate both sides of the resulting equation with respect to x, multiply both sides of the result by x, differentiate again, multiply by x again, and set x equal to 1/2. What do you get?

PHYSICS 2401 WEEK 8 Chapter 28 DC Circuits Ideal Battery: Remember : Ph= I * R = V /R = V*I Model of non-ideal battery (real life) r = internal resistance ε= open current voltage Isc = ε /r comes from R = V/I V t I*R =L ε - I*r Battery Pb= P h 2* 2* ε*I = I r + I R * * ε = I r + I RL EX. A...