- 1(current)
Q. No.(\(N=\) number of turns, \(B=\) magnetic field, \(A=\) area of coil, and \(C=\) Torsional constant of spring)
| 1. | \(N\) is small | 2. | \(B\) is small |
| 3. | \(A\) is small | 4. | \(C\) is small |
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Which among the following options needs to be decreased to increase the sensitivity of a moving coil galvanometer?
| 1. | the number of turns in the coil. | 2. | the area of the coil. |
| 3. | the magnetic field. | 4. | the couple per unit twist of the suspension. |
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1. \(i \propto \tan \theta\)
2. \(i \propto \theta\)
3. \(i \propto \theta^{2}\)
4. \(i \propto \sqrt{\theta}\)
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| 1. | \(40~ \Omega\) | 2. | \(25~ \Omega\) |
| 3. | \(250~ \Omega\) | 4. | \(500~ \Omega\) |
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What happens when the number of turns in a galvanometer is doubled?
| 1. | The voltage sensitivity becomes double. |
| 2. | The current sensitivity becomes double. |
| 3. | the voltage sensitivity becomes half. |
| 4. | The current sensitivity remains the same. |
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1. \(\frac{\sigma_{i}}{G} = \sigma_{v}\)
2. \(\frac{\sigma_{v}}{G} =\sigma_{i}\)
3. \(\frac{G}{\sigma_{v}} =\sigma_{i}\)
4. \(\frac{G}{\sigma_{i}} =\sigma_{v}\)
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- 1(current)
Q. No.
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