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Class 12 › Physics › Electric Potential & Capacitance
CBSE2019Class Class 12 · Physics1 Marks · Mcq✅ Verified
A parallel plate air capacitor is charged to a potential difference of V. If distance between the plates is increased (battery disconnected), then potential difference between the plates
A. decreases
B. increases
C. becomes zero
D. does not change
✅ Answer & Solution
✅ Correct Answer: B
โ Correct Answer: (B) Increases
๐ Condition: Capacitor is <b>disconnected from battery</b> โ Charge Q = constant
Step 1 โ Effect on Capacitance:
C = ฮตโA / d
As d โ, C โ
Step 2 โ Effect on Potential:
V = Q / C
As C โ and Q is constant โ <b>V increases</b>
โด <b>Potential difference increases</b> when plate separation is increased.