Question

Heat produced by a current is obtained a relation H =I^2RT. If the errors in measuring these
quantities current resistance, and time are 1%,2% and 1% respectively, then error in calculating energy produced is
a)5%
b)4%
c)3%
d)2%​

Answer 1

Answer:

Heat produced H=i

2

RT

logH=2logi+logR+logT

H

ΔH

=

i

2Δi

+

R

ΔR

+

R

ΔT

⇒ Error in H=2×3+4+6=16%.