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Question: Answered & Verified by Expert
Find the equivalent resistance about any branch of the base of the square pyramid shown. Assume resistance of each branch is R.

PhysicsCurrent ElectricityJEE Main
Options:
  • A 7R15
  • B 8R15
  • C R2
  • D none of these
Solution:
1066 Upvotes Verified Answer
The correct answer is: 8R15
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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