COMEDK · Physics · 19. Current Electricity
A galvanometer of resistance 50\(\Omega\) is having 30 divisions and a current sensitivity 10 mA/div. What should be the shunt resistance so that it can be converted into an ammeter of range 10A?
- A \(2.5\ \Omega\)
- B \(1.55\ \Omega\)
- C \(0.76\ \Omega\)
- D \(3.1\ \Omega\)
Answer & Solution
Correct Answer
(B) \(1.55\ \Omega\)
Step-by-step Solution
Detailed explanation
The full scale deflection current of the galvanometer is given by: \(I_g = \text{Number of divisions} \times \text{Current sensitivity}\) \(I_g = 30 \times 10 \times 10^{-3}\ \text{A} = 0.3\ \text{A}\) The shunt resistance \(S\) required to convert the galvanometer into an…
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