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KCET2023PhysicsCurrent Electricity

The equivalent resistance between the points A and B in the following circuit is

Options

  1. A0.5
  2. B5.5
  3. C0.05
  4. D5

Correct answer

B. 5.5

Step-by-step solution

Let x be the equivalent resistance of the circuit, then array ll & R_ A B =x & x 2 2+x +2+2=x & 2 x x+2 =x-4 & 2 x=(x-4)(x+2) & 2 x=x^2+2 x-4 x-8 & x^2-4 x-8=0 & -(-4) (-4)^2-4 1 (-8) 2 1 & = 4 48 2 = 4 4 3 2 & =2+2 3 =5.46 5.5 array

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