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Concepts Of Physics MCQ Edition [Volume 2]PhysicsElectric Current in Conductors

Determine the equivalent resistance between points a and b for the network illustrated in the figure.

Options

  1. A2r/3
  2. Br/2
  3. Cr/3
  4. D3r

Correct answer

C. r/3

Step-by-step solution

Label the junction between the first and second resistor as c , and the junction between the second and third resistor as d . A connecting wire joins node a to node d , making them equipotential. Thus, node d acts as node a . Another connecting wire joins node c to node b , making them equipotential. Thus, node c acts as node b . The first resistor is connected between node a and node c (node b ). The second resistor is connected between node c (node b ) and node d (node a ). The third resistor is connected between

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