Three capacitors are connected to a battery as shown in the figure below. Their

Question

Three capacitors are connected to a battery as shown in the figure below. Their capacitances are C1 = 3C, C2 = C, and C3 = 5C.

(a) What is the equivalent capacitance of this set of capacitors (in terms of C)?


(b) State the ranking of the capacitors according to the charge they store, from largest to smallest.
Q 2 > Q 3 > Q 4

(c) Rank the capacitors according to the potential differences across them, from largest to smallest.
5?V1 > ?V2 = ?V3
?V2 > ?V3 > ?V1
?V1 > ?V2 > ?V3
?V1 = ?V2 < ?V3


(d) Assume C3 is increased. Explain what happens to the charge stored by each capacitor.

6Q3 and Q1 increases; Q2 decreases.
Q3 and Q2 increases; Q1 decreases.
Q3, Q1, and Q2 increases.
All charges stay the same.

Explanation / Answer

C1>C3>C2 ?V2 > ?V3 > ?V1 Q3 and Q2 increases; Q1 decreases

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