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When A wire of resistance 12 R is bent to form a circle. The effective resistance across its diameter is
  • a)
    2R
  • b)
    3R
  • c)
    4R
  • d)
    R
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
When A wire of resistance 12 R is bent to form a circle. The effective...
Given that resistance of wire 12 Ω. It is bent and form circle, then resistance f each semicircle is 6 Ω. Now, measuring the resistance across its diameter, these two resistances are in parallel. Their effective resistance 

=3R
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