A) 5.2%
B) 25%
C) 7%
D) 10%
E) 2.5%
Correct Answer: C
Solution :
Given voltage \[V=\left( 100\pm 5 \right)\]volt, Current \[I~=\left( 10\text{ }\pm 0.2 \right)\,A\] From Ohms law \[V=IR\] \[\therefore \] Resistance \[R=\frac{V}{I}\] Maximum percentage error in resistance \[\left( \frac{\Delta R}{R}\times 100 \right)=\left( \frac{\Delta V}{V}\times 100 \right)+\left( \frac{\Delta I}{I}\times 100 \right)\] \[=\left( \frac{5}{100}\times 100 \right)+\left( \frac{0.2}{10}\times 100 \right)\] \[=5+2=7%\]You need to login to perform this action.
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