Physics · Electrical Instruments
How would you convert a Permanent Magnet Moving Coil (PMMC) instrument that provides full-scale deflection at a potential difference of 20 mV and a current of 5 mA into a voltmeter with a range of 0-250 V?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Connect a series resistor of 48.996 kΩ.
- 2Connect a shunt resistor of 49.996 kΩ.
- 3Connect a series resistor of 49.996 kΩ.✓
- 4Connect a shunt resistor of 48.996 kΩ.
Correct answer
Connect a series resistor of 49.996 kΩ.
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