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NTA Abhyas JEE Main2020PhysicsCurrent ElectricityPractice

Find the equivalent resistance about any branch of the base of the square pyramid shown. Assume resistance of each branch is R .

Options

  1. A7 R 15
  2. B8 R 15
  3. CR 2
  4. Dnone of these

Correct answer

B. 8 R 15

Step-by-step solution

Looking at the circuit from above, we can see that between any two adjacent points (let say A and B), the circuit is symmetric so the junction P can be disconnected.

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