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JIPMER2015PhysicsCurrent Electricity

A wire of resistance 10 is bent to form a complete circle. Find its resistance between two diametrically opposite point.

Options

  1. A5
  2. B2.5
  3. C1.25
  4. D10 3

Correct answer

B. 2.5

Step-by-step solution

The wires A D C and A B C will have resistance 5 each. These two are joined in parallel between A and C . The equivalent resistance R between A and C is, therefore given by R= 5 5 5 +5 =2.5

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