Q132 / 160 · WBJEE 2010 · Physics
$$
\text { The reading of the ammeter in the following figure will be }
$$
- A$0.8 \mathrm{~A}$
- B$0.6 \mathrm{~A}$
- Correct answerC$0.4 \mathrm{~A}$
- D$0.2 \mathrm{~A}$
Solution
Hints: $\frac{1}{R}=\frac{1}{2}+\frac{1}{3}+\frac{1}{6}=\frac{3+2+1}{6}=1 \Omega$
$$
\begin{aligned}
& \mathrm{R}_{\text {eq }}=1+4=5 \Omega \\
& \mathrm{I}=\frac{2}{5}=0.4 \mathrm{~A}
\end{aligned}
$$
Hence, the correct answer is option: 'C'.