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BITSAT2014PhysicsCurrent ElectricityActual

A wire X is half the diameter and half the length of a wire Y of similar material. The ratio of resistance of X to that of Y is

Options

  1. A8: 1
  2. B4: 1
  3. C2: 1
  4. D1: 1

Correct answer

C. 2: 1

Step-by-step solution

R D ² Rx Ry = 2 1

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