Physics Electrostatics SZABMU 2023
PMDC Verified Question 40 of 131
Q.157 When dielectric is placed between the plates of a capacitor then capacitance will:
A
Decrease
B
Increase
C
Becomes half
D
Remains same
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Increase
1. Concept:

Inserting a dielectric medium allows the capacitor plates to hold more charge at the exact same voltage, fundamentally boosting its storage capacity.

2. Formula:

$$ C_{med} = \epsilon_r C_{vac} $$

3. Solution:

  • Because the dielectric constant (\( \epsilon_r \)) of any insulating material is always greater than 1 (vacuum), multiplying the baseline capacitance by \( \epsilon_r \) guarantees that the final capacitance mathematically increases.


4. Why other options are incorrect:

Decreasing the capacitance (Option A) would occur if you removed the dielectric. The other options contradict standard electrostatic enhancement.

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