AP EAMCET · PHYSICS · Mathematics in Physics
The emf of a cell of internal resistance \(2 \Omega\) is measured using a voltmeter of resistance \(998 \Omega\). The error in the emf measured is
- A \(0.4 \%\)
- B \(4 \%\)
- C \(2 \%\)
- D \(0.2 \%\)
Answer & Solution
Correct Answer
(D) \(0.2 \%\)
Step-by-step Solution
Detailed explanation
The reading of voltmeter, \(\begin{aligned} & V=I R \\ & \Rightarrow V=\left(\frac{E}{998+2}\right) \times 998 \\ & =0.998 \mathrm{E} \end{aligned}\) \(\therefore \%\) error in emf,…
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