Question
Physics Question on Units and measurement
The maximum error in the measurement of resistance, current and time for which current flows in an electrical circuit are 1%,2% and 3% respectively The maximum percentage error in the detection of the dissipated heat will be:
A
2
B
4
C
6
D
8
Answer
8
Explanation
Solution
EH=I2R×t
EΔE×100=I2ΔI×100+RΔR×100+TΔT×100
=2×2+1+3=8