NCERT Class XII Chapter
Electrostatic Potential and Capacitance
Questions With Solutions
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Question : 7
Total: 37
Three capacitors of capacitances 2 pF, 3 pF and 4 pF are connected in parallel.
(a) What is the total capacitance of the combination.
(b) Determine the charge on each capacitor if the combination is connected to a 100 V supply.
(a) What is the total capacitance of the combination.
(b) Determine the charge on each capacitor if the combination is connected to a 100 V supply.
Solution:
(a) C = C 1 + C 2 + C 3 = 2 + 3 + 4 or C = 9 pF
(b) Since the capacitors are in parallel, so potential difference across each of them is same i.e.
V 1 = V 2 = V 3 = 100 V
So, charges stored on capacitors are
Q 1 = C 1 V 1 = 2 × 100 = 200 pC
Q 2 = C 2 V 2 = 3 × 100 = 300 pC
Q 3 = C 3 V 3 = 4 × 100 = 400 pC
(b) Since the capacitors are in parallel, so potential difference across each of them is same i.e.
So, charges stored on capacitors are
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