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Question: Answered & Verified by Expert
A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown in the diagram. The capacitance of the arrangement is-

PhysicsElectrostaticsNEET
Options:
  • A ε0Ad
  • B  1811ε0Ad
  • C  1118ε0Ad
  • D ε0A3d
Solution:
1831 Upvotes Verified Answer
The correct answer is:  1118ε0Ad
All the steps of stair makes three parellel capacitors.

Ceq=C1+C2+C3

=ε0A3d+ε0A3 × 2d+ε0A3×3 d=11ε0A18 d

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