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COMEDK2012PhysicsCurrent Electricity

A wire of uniform cross-section has a resistance R . It is cut into ten equal parts. The parts are connected in parallel between two points A and B . The effective resistance between A and B will be

Options

  1. A0.01 R
  2. B0.1 R
  3. CR
  4. D10 R

Correct answer

A. 0.01 R

Step-by-step solution

When a wire of resistance R is cut into 10 equal parts, then resistance of each part, R^ = R 10 =0.1 R Equivalent resistance of parallel combination of resistors, is R_ eq = R^ 10 = 0.1 R 10 =0.01 R

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