MHT CET · Physics · Current Electricity
A galvanometer coil has a resistance \(80 \Omega\) and current for full-scale deflection is 10 mA . A resistance of \(920 \Omega\) is connected in series with the galvanometer to make a voltmeter. If the least count of the voltmeter is 0.2 V , the number of divisions on the scale is
- A 40
- B 46
- C 50
- D 92
Answer & Solution
Correct Answer
(C) 50
Step-by-step Solution
Detailed explanation
Total resistance \(R = R_g + R_s = 80 \, \Omega + 920 \, \Omega = 1000 \, \Omega\) Full-scale voltage \(V = I_g R = (10 \times 10^{-3} \, \text{A}) (1000 \, \Omega) = 10 \, \text{V}\)
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