Three circuits have the form open. shown in the diagram. The capacitor is initia

Question

Three circuits have the form open. shown in the diagram. The capacitor is initially uncharged and the switch S s the diagram The values of the emf , resistance and R, and capacitance C for cach for the circuits are circuit l: ?-18V,R.. 9 ?, C-9AdF circuit 2: ?.36 V, R " 6 ?.ca5pE circuit 3: 12 V. R-32, C-3 Rank the circuits according to the time it takes to reach 63% of the maximum charge in the capacitor plates afar the switch S has been closed, least to greatest. A) 1,2. 3 B) 3. 2, I c) 2.3.1 D) 2, 1. 3 Problem 4 (6 pts] In the circuit below, Ri R2 -Rs 22, the battery supplies 6 V. What is the potential drop across resistor Ri? R,

Explanation / Answer

Qt = Q0(1-e-t/RC)

Qt/ Q0 = 0.63 = 1-e-t/RC

e-t/RC =1-0.63

e-t/RC = 0.37

-r/RC=log0.37

t=-RC* log0.37

Thus time depends only on values of R and C

Circuit 1: E=18 V, R= 9 ?, C= 9 µF

t=17.9s

Circuit 2: E=18 V, R= 6 ?, C= 5 µF

t=29.83

Circuit 3: E=18 V, R= 3 ?, C= 3 µF

t= 8.95

Thus rank is: circuit 3 < circuit 1< circuit 2

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.