HY 2054 U02-Spring 2016 Dr. He 18,57 Problem 18.57 Part A How much change does a
ID: 1586259 • Letter: H
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HY 2054 U02-Spring 2016 Dr. He 18,57 Problem 18.57 Part A How much change does a 17 v battery have to supplyto fully dharge a 28HF capacitor and 5 HF capacior when theyre in paralel? Express your answer to two signincantfigures and include the appropriate units. Q- 130 HC My Answers Give Up Correct Significant Figures Feedback Your answer 134 Mc either rounded differently or used a dinerent number of signifcant sgures than requined calculation in this item, keep all the digits and round as the final step before submtting your answer Part B How much energy does the battery have to supply in this case? Express your answer to two significant figures and include the appropriate units. U 1.1.10 J My Answers correct Part C How much charge does a 17 v batery have to supply to charge a28HF capacitor and a 51 HF capacitor when they re in series? Express your answer to two significant figures and include the appropriate units. CHLA Q. Value Units My Answers Part D How much energy does the battery have to supply in this case? Express your answer to two significant figures and include the appropriate units. Value Units My Answers Glve upExplanation / Answer
PART (A)
TOTAL CAPACITANCE WHEN THEY ARE CONNECTED IN PARALLEL
Ceq= C1 + C2 = (2.8)+(5.1)=7.9 uF where uF is micro farad.
TOTAL CHARGE SUPPLIED BY BATTERY Q=Ceq*V
=> Q=( 7.9 uF) * 17= 134.3 uC = 13.43*(10^-5) Coulomb
PART (B)
ENERGY SUPPLIED BY BATTERY E= (Ceq*(V^2))/2
=> E= ((7.9uF)*((17)^2))/2=1.14*10^-3 Joule
PART (C)
TOTAL CAPACITANCE WHEN THEY ARE CONNECTED IN SERIES Ceq= (C1*C2)/(C1+C2)
Ceq= ((2.8)*(5.1))/(2.8+5.1)= 1.807 uF
CHARGE SUPPLIED BY BATTERY Q = Ceq*V= (1.807uF)*17 = 30.719 uC = 30.719*10^-6 Coulomb
PART (D)
ENERGY SUPPLIED BY BATTERY E = (Ceq*V^2)/2
E = ((1.807uF)*(17)^2)/2 = 261.11uC =261.11*10^-6 Joule
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