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MHT CET202122 Sep 2021Morning ShiftPhysicsCapacitanceActual

In the given figure potential at point ' A ' is 900 volt and point ' B ' is earthed. What will be the potential at point ' P '?

Options

  1. A900 ~V
  2. B100 ~V
  3. C300 ~V
  4. D600 ~V

Correct answer

C. 300 ~V

Step-by-step solution

Capacitors C ₂ an C ₃ are in parallel. Hence their equivalent capacitance C ₄= C ₂+ C ₃=8+4=12 F C ₄ and C ₁ are in series. Their equivalent capacitance C = 12 6 12+6 = 72 18 =4 F Charge stored by the combination q = CV =4 900=3600 C In the series combination, charge in same on each capacitor. Change on C ₁=3600 C P.D. across C ₁ is V ₁= q C ₁ = 3600 6 =600 ~V aligned & V _ A - V _ P =600 900- V _ P =600 & V _ P =300 ~V aligned

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