The first three figures (shown in 1, 2, and 3) show three sections of circuit th

Question

The first three figures (shown in 1, 2, and 3) show three sections of circuit that are to be connected in turn to the same battery via a switch as in the last figure. The resistors are all identical, as are the capacitors.

(a) Rank the sections according to the final (equilibrium) charge on the capacitor, greatest first. (Use only ">" or "=" symbols. Do not include any parentheses around the letters or symbols.)
  

(b) Rank the sections according to the time required for the capacitor to reach 50% of its final charge, greatest first. (Use only ">" or "=" symbols. Do not include any parentheses around the letters or symbols.)

Explanation / Answer

part a)

Q1=Q2=Q3

same battery same final charge

Q = CV ( charge does not depend on R)

part b)

t = RC

R1 = 2R

R2 = R/2

R3 = R(only charging through 1 resistor)

t1>t3>t2

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