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NEET2010PhysicsCapacitanceActual

Three capacitors of capacitances 1 F , 2 F and 4 F are connected first in a series combination, and then in a parallel combination. The ratio of their equivalent capacitances will be

Options

  1. A2:49
  2. B49:2
  3. C4:49
  4. D49:4

Correct answer

C. 4:49

Step-by-step solution

In series combination, 1 C₁ = 1 1 + 1 2 + 1 4 = 4+2+1 4 = 7 4 C₁= 4 7 F In parallel combination, aligned & C₁=1+2+4=7 F & C₁ C₂ = 4 / 7 7 = 4 49 aligned

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