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NEET2010PhysicsCurrent ElectricityActual

The equivalent resistance across A and B is

Options

  1. A2
  2. B3
  3. C4
  4. D5

Correct answer

C. 4

Step-by-step solution

The equivalent circuit can be redrawn as We have, P Q = R S ie, 4 4 = 4 4 So, the given circuit is a balanced Wheatstone's bridge. Hence, the equivalent resistance R_ A B = (4+4) (4+4) (4+4)+(4+4) = 8 8 8+8 = 64 16 =4

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