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Class 12 › Physics › Electric Potential & Capacitance
CBSE2016Class Class 12 · Physics1 Marks · Mcq✅ Verified
The capacitance of a parallel plate capacitor ..........by the introduction of a dielectric between the plates of capacitor.
A. increases
B. decreases
C. remains same
D. nothing can be said
✅ Answer & Solution
✅ Correct Answer: A
โ Correct Answer: (A) Increases
๐ Concept: Effect of Dielectric on Capacitance
Formula with dielectric:
C' = K ร C (where K = Dielectric Constant > 1)
Reason:
โข The dielectric reduces the <b>net electric field</b> between plates.
โข This reduces <b>potential difference</b> for the same charge.
โข Since C = Q/V, and V decreases โ <b>C increases</b>.
โด Capacitance <b>increases</b> when a dielectric is introduced.