In Chapter 23 we asserted, without proof, that the electric field outside a sphere of total charge Q is the same as the field of a point charge Q at the center. Use Gausss law to prove this result.

Goals • To understand capacitors and calculate capacitance • To analyze networks of capacitors • To calculate the energy stored in a capacitor • To examine dielectrics and how they affect capacitance Introduction • How does a camera’s flash unit store energy • Capacitors are devices that store electric potential energy. • The energy of a capacitor is actually...