How much charge does a 17 V battery have to supply to fully charge a 2.8 mu F ca

Question

How much charge does a 17 V battery have to supply to fully charge a 2.8 mu F capacitor and a 5.1 mu F capacitor when they're in parallel? Express your answer to two significant figures and Include the appropriate units. Your answer 134 mu C was either rounded differently or used a different number of significant figures than required calculation in this item, keep all the digits and round as the final step before submitting your answer. How much energy does the battery have to supply in this case? Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

in parallel

Cp = c1 + c2

Cp = 2.8 + 5.1 = 7.9 uF

Q =Cp*V = 7.9*17 = 134.3 uC

++++++

B)

energy U = 0.5*Cp*v^2 = 0.5*7.9*10^-6*17^2

U = 0.00114155 J <<-------answer

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