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STD 12 - 2. Electric potential and capacitance — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 2. Electric potential and capacitance4 Marks
MCQ
A parallel plate capacitor is charged and then disconnected from the source of potential difference. If the plates of the condenser are then moved farther apart by the use of insulated handle, which one of the following is true?
  • A
    the charge on the capacitor increases
  • B
    the charge on the capacitor decreases
  • C
    the capacitance of the capacitor increases
  • ✓
    the potential difference across the plate increases
✓

Answer

Correct option: D.
the potential difference across the plate increases
d
$Q=C V$ where $C=\frac{\in_{0} A}{d}$ and $V=E d$

if $d$ increases then $C$ will decrease.

Hence option $C$ is wrong.

$V$ will increase because $E$ remains same.

Hence option $D$ is correct.

$Q=\frac{\in_{0} A}{d} \times E d$ thus $Q$ will not depend on $d$ Hence option $A$ and $B$ are wrong.

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