OO T-Mobile LTE9:37 PM 47% EO Problem Set 1 PHY2054 001 FAMU TERM-C SUMM2016 Pro

Question

OO T-Mobile LTE9:37 PM 47% EO Problem Set 1 PHY2054 001 FAMU TERM-C SUMM2016 Problem 19 Problem 19.92 Two capacitors. C #2.4 F and C2 = 1.8 F . are connected in parallel to a 24-V source as shown in. After they are charged they are disconnected from the source and from each other, and then reconnected directly to each other with plates of opposite sign connected together 01 0 01 02 24V C Ca 01 01 -01 +02 Part A Find the charge on capacitor Ci after equilibrium is established Express your answer to two significant figures and include the appropriate units. 91 92 1 Value Units Submit Incorrect Try Again; S attempts remaining My Answers Give Up Part B Find the potential across capacator C1 after equilibrium is established

Explanation / Answer

A) Q1 = C1*V

= 2.4*24

= 57.6 micro C

Q2 = C2*V

= 1.8*24

= 43.2 micro C

net charge on both capacitors, Qnet = Q1 - Q2

= 57.6 - 43.2

= 14.4 micro C

Cnet = C1 + C2 = 2.4 + 1.8 = 4.2 micro F

Vnet = Qnet/Cnet

= 14.4/4.2

= 3.428 volts

so, q1 = C1*Vnet

= 2.4*3.428

= 8.23 micro C

B) V1 = Vnet = 3.428 volts

C) q2 = Qnet - q1

= 14.4 - 8.23

= 6.17 micro C

D) v2 = Vnet = 3.428 volts

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