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An ammeter of resistance $0.2 \Omega$ and range $10 \mathrm{~mA}$ is to be used to read potential difference upto 1 volt. It will have to be connected to A $99.8 \Omega$ resistance in series B $99.8 \Omega$ resistance in parallel C $0.1 \Omega$ resistance in parallel D $0.1 \Omega$ resistance in series
An ammeter of resistance $0.2 \Omega$ and range $10 \mathrm{~mA}$ is to be used to read potential difference upto 1 volt. It will have to be connected to A $99.8 \Omega$ resistance in series B $99.8 \Omega$ resistance in parallel C $0.1 \Omega$ resistance in parallel D $0.1 \Omega$ resistance in series
Physics | Previous Year Question Papers
An ammeter of resistance $0.2 \Omega$ and range $10 \mathrm{~mA}$ is to be used to read potential difference upto 1 volt. It will have to be connected to A $99.8 \Omega$ resistance in series B $99.8 \Omega$ resistance in parallel C $0.1 \Omega$ resistance in parallel D $0.1 \Omega$ resistance in series

Correct option is
A $99.8 \Omega$ resistance in series
$$
\begin{array}{l}
\mathrm{V}=\mathrm{I}_{g}\left(\mathrm{R}+\mathrm{R}_{g}\right) \\
\therefore 1=10 \times 10^{-3} \times(\mathrm{R}+0.2) \\
\Rightarrow \mathrm{R}=100-0.2=99.8 \Omega
\end{array}
$$

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