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JEE Main2005PhysicsCurrent ElectricityActual

A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be

Options

  1. Adoubled
  2. Bfour times
  3. Cone fourth
  4. Dhalved

Correct answer

A. doubled

Step-by-step solution

H = V ^2 t R H ^ = V ^2 R ^ t Given R ^ = R / 2

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