Question

10. The heat generated in a circuit is
given by H=Rt joule where I is the
current, R is the resistance and t is the
time. The percentage errors in meas-
uring I, R and t are 2%, 2% and 1%
respectively. What is the percentage
error in the measurement of heat ?

Answer 1

Answer:

The heat generated in a circuit is given by

, where

is current ,

is resistance , and

is time . If the percentage errors in measuring

, respectively , then the maximum error in measuring heat will be

Answer 2

Answer:

Give that - % error in I = 2, % error in R = 2, % error in t = 1

H= I^2Rt

ΔH/H*100 = 2ΔI/I*100 + ΔR/R*100 + Δt/t*100

Now,

% error in heat = 2*2 +2+ 1

= 7

therefore % error in heat is 7%

Explanation:

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