TS EAMCET · Physics · Current Electricity
The ratios of the voltage sensitivities, resistances and areas of the coils of two moving coil galvanometers \(A\) and \(B\) are \(4: 3,3: 4\) and \(1: 2\) respectively. If the number of turns of the coil of galvanometer A is 200, then the number of turns of the coil of galvanometer B is
(All other quantities remain same in both the cases)
- A 100
- B 150
- C 200
- D 400
Answer & Solution
Correct Answer
(A) 100
Step-by-step Solution
Detailed explanation
\(V_s \propto \frac{NA}{R}\) \(\frac{V_{sA}}{V_{sB}} = \frac{N_A}{N_B} \times \frac{A_A}{A_B} \times \frac{R_B}{R_A}\) \(\frac{4}{3} = \frac{N_A}{N_B} \times \frac{1}{2} \times \frac{4}{3}\) \(\frac{N_A}{N_B} = \frac{4}{3} \times 2 \times \frac{3}{4} = 2\)…
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