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Q. No.The net resistance of a voltmeter should be large to ensure that:
| 1. | It does not get overheated. |
| 2. | It does not draw excessive current. |
| 3. | It can measure large potential differences. |
| 4. | It does not appreciably change the potential difference to be measured. |
Subtopic: Â Conversion to Ammeter & Voltmeter |
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Level 3: 35%-60%
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A galvanometer of resistance \(50~\Omega\) is connected to a battery of \(3~\text V\) along with a resistance of \(2950~\Omega\) in series. A full-scale deflection of \(30\) divisions is obtained in the galvanometer. In order to reduce its deflection to \(20\) divisions, the resistance added in series should be:
1. \(1050~ \Omega\)
2. \(1550~ \Omega\)
3. \(2050~ \Omega\)
4. \(1500~ \Omega\)
1. \(1050~ \Omega\)
2. \(1550~ \Omega\)
3. \(2050~ \Omega\)
4. \(1500~ \Omega\)
Subtopic: Â Moving Coil Galvanometer |Â Conversion to Ammeter & Voltmeter |
 51%
Level 3: 35%-60%
AIPMT - 2008
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