Physics Electrostatics SZABMU 2022
PMDC Verified Question 69 of 131
Q.129 The capacitance of capacitor does not depend on:
A
Area of plates
B
Medium
C
Distance between plates
D
Thickness of plates
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Thickness of plates
1. Concept:

The physical capacity of a parallel plate capacitor to store charge is dictated purely by the geometry of the facing surfaces and the insulating material between them.

2. Formula:

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

3. Solution:

  • The formula explicitly relies on Area (\( A \)), Separation Distance (\( d \)), and the Permittivity of the Medium (\( \epsilon \)).


  • The thickness of the conducting metal plates themselves is mathematically irrelevant to the electrostatic field established in the gap.


4. Why other options are incorrect:

Changing the area, distance, or dielectric medium will physically alter the capacitance value, making options A, B, and C dependent variables.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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