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Capacitor:
two nearby surfaces of equal and opposite charge —> stores potentia energy
what is the voltage of capacitor?
voltage of the battery
formula for capacitance
what does this measure?
C = Q V
the strength of capacitor
E field between plates is what?
What about outside plates?
Uniform
outside = 0
magnitude of uniform electric field within capacitor
E = Q/ E(0) A
three general formulas for energy stores in any capacitor
U = ½ CV² = ½ QV = ½ Q² / C
energy of a parallel plate capacitor
½ CV² / A(d) = ½ E(0) E²
Series vs Parallel chart
Dielectric
insulator between charges plates increase capacitance
C = k C(0)
Dielectric Constant charge vs constant voltage
dielecric always ___ e fields
weaken e fields E = E(0) / k
