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BITSAT2020PhysicsMathematics in PhysicsActual

The heat generated in a circuit is given by Q = I ² Rt , where I is current, R is resistance and tis time. If the percentage errors in measuring I. R and t are 2 %, 1 % and 1 % respectively, then the maximum error in measuring heat will be

Options

  1. A2 %
  2. B3 %
  3. C4 %
  4. D6 %

Correct answer

D. 6 %

Step-by-step solution

aligned Q Q 100 &= 2 I I 100+ R R 100+ t t 100 &=2 2 %+1 %+1 %=6 % aligned

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