Physics Electrostatics KU 2024
PMDC Verified Question 14 of 131
Q.191 Capacitance of a capacitor increases with decrease in:
A
Dielectric constant
B
Plate area
C
Permittivity
D
Plate separation
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Plate separation
1. Concept:

Capacitance relies on the geometric inverse proportionality between storage capability and the distance isolating the oppositely charged plates.

2. Formula:

$$ C = \frac{\epsilon A}{d} $$

3. Solution:

  • Because separation distance (\( d \)) resides strictly in the denominator, decreasing its value mathematically forces the total value of \( C \) to grow larger.


  • Physically, pushing the plates closer increases the mutual attraction between opposite charges, allowing the plates to hold more total charge at the same voltage.


4. Why other options are incorrect:

Decreasing Dielectric constant, Permittivity, or Plate Area (all numerator variables) would strictly cause the Capacitance to actively decrease.

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