Question

According to Joule's law of heating, heat produced H = I²Rt, where I is current, R is resistance and t is time. If the errors in the measurement of I, R and t are 3%, 4% and 6% respectively then error in the measurement of H is

Options :

  1. ±17%

  2. ±16%

  3. ±19%

  4. ±25%

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Answer :

±16%

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