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  4. If potential and current are V=(100± 0.5) volt and I=(10± 0.2) text A respectively, then value of resistance will be

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Q. If potential and current are $ V=(100\pm 0.5) $ volt and $ I=(10\pm 0.2)\text{ }A $ respectively, then value of resistance will be

Rajasthan PETRajasthan PET 2001

Solution:

Maximum error $=0.5+0.2=0.7$
$\begin{aligned} \therefore \quad R &=\frac{V}{I} \pm \text { error }=\frac{100}{10} \pm 0.7 \\=&(10 \pm 0.7) \Omega \end{aligned}$