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MHT CET 2025 (19 Apr, Shift 2) · Dielectrics

Dielectrics question from MHT CET 2025 (19 Apr, Shift 2)

Q31MHT CET 2025 · 19 APR · SHIFT 2Easy

Dielectrics

Two parallel plate air capacitors of same capacity ' C ' are connected in parallel to a battery of e.m.f. ' EE '. Then one of the capacitors is completely filled with dielectric material of constant ' K '. The change in the effective capacity of the parallel combination is

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Answer: (d)

  1. Initially Ceq=C+C=2CC_{eq} = C + C = 2C.
  2. After filling one: Ceq′=KC+CC_{eq}' = KC + C.
  3. Change =KC+C−2C=C(K−1)= KC + C - 2C = C(K-1).
  4. So the answer is (d) C(K−1)C(K-1).
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