A galvanometer has a coil resistance of Realy = 41.4 Q. It is to be made into a voltmeter with a full-scale voltage equal to = 115.5 mA, what size additional resistor should %3D V = 155.0 V. If the galvanometer deflects full scale for a current of Ialv be used?
A galvanometer has a coil resistance of Realy = 41.4 Q. It is to be made into a voltmeter with a full-scale voltage equal to = 115.5 mA, what size additional resistor should %3D V = 155.0 V. If the galvanometer deflects full scale for a current of Ialv be used?
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Transcribed Image Text:A galvanometer has a coil resistance of Rgaly = 41.4 Q. It is to be made into a voltmeter with a full-scale voltage equal to
= 115.5 mA, what size additional resistor should
V = 155.0 V. If the galvanometer deflects full scale for a current of I galv
be used?
additional resistor size:
Ω
Expert Solution
Step 1
Given Data:
- The resistance of galvanometer is, RG =41.4 .
- The full scale voltage of voltmeter is, V = 155 V.
- The galvanometer current is, IG = 115.5 mA.
According Ohm's law, we have,
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