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7. The heat produced in a long wire is characterized byresistance, current and time through which the currentpasses. If the errors in measuring these. quantitiesare respectively 1%, 2% and 1%, then total error incalculating the energy produced is:20a1

Answer»

The heat produced in a wire due to current flow is give by

H =I2Rt

∴ΔH/H

= 2ΔI / I +ΔR/R +Δt / t

=2 x 0.02 + 0.01 +0.01 = 0.06 =6%



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