A moking cell galvanometer has a resistance of 10 and a full scale deflection of \(0.0 IA\), it can be converted into a A theter of \(10 V\) full-scale deflection by connecting a resistor of
A. \(969 \Omega\) párallel B. \(990 \Omega\) parallel C. \(10 \Omega\) parallel D. \(10 \Omega\) parallel
Correct Answer: B
Explanation
Since the total current which can pass through the galvanometer is O . D . I . A The total p.d across the galvanometer and the resistanceRis. \(OIA (10+ R )=10\) \begin{aligned} &10+R z 1000 \\ &R=1000-10=990 \Omega \text { inseries } \end{aligned}
