AP EAMCET · PHYSICS · Current Electricity
A moving coil galvanometer of resistance 100 \(\Omega\) shows full scale deflection when a current of 100 micro-amperes passes through it. If it is intended to show full scale deflection when a current of 1 milliampere passes through it, the value of shunt resistance in ohms to be connected to the galvanometer is.
- A \(\frac{9}{4}\)
- B \(\frac{10}{3}\)
- C \(\frac{100}{9}\)
- D \(\frac{900}{7}\)
Answer & Solution
Correct Answer
(C) \(\frac{100}{9}\)
Step-by-step Solution
Detailed explanation
Resistance of galvanometer \[ \begin{gathered} G=100 \Omega \\ I_g=100 \mu \mathrm{A}=100 \times 10^{-6} \mathrm{~A}=0.1 \times 10^{-3} \mathrm{~A} \\ I=1 \mathrm{~mA}=1 \times 10^{-3} \mathrm{~A} \end{gathered} \] Shunt resistance…
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