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MHT CET202015 Oct 2020Evening ShiftPhysicsCapacitanceActual

Two identical parallel plate air capacitors are connected in series to a battery of e..m.f. ^ V ^ . If one of the capacitor is inserted in liquid of dielectric constant ' K ^ , then potential difference of the other capacitor will become

Options

  1. AK V ( K +1)
  2. BKV K +1
  3. CK +1 KV
  4. DK V (1- K )

Correct answer

B. KV K +1

Step-by-step solution

Let the capacitance of capacitor (C₂ ) be (C ). Thus capacitance of capacitor (C₁ ) is KC. Potential across the capacitor ( C ₂, ~V ₂= C ₂ C ₁+ C ₂ ~V ) ( V ₂= KC C ₁+ KC V ) ( V ₂= KV K +1 )

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