Kirchhoff's Laws & Measuring Instruments
Two identical galvanometers are converted into voltmeter and millivoltmeter. As compared to the series resistance of voltmeter, the series resistance of millivoltmeter will be
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Answer: (c)
- Series resistance , so it grows with the range .
- A millivoltmeter has a much smaller range than a voltmeter, so it needs a smaller series resistance.
- So the answer is (c) less.