A PMMC instrument with a full-scale defection of 100 μA and a coil resistance of 30 kΩ is to be converted into a voltmeter. A multiplier resistance Rs is used for the voltmeter to measure 10 V at a full scale. Which of the following is/are true?
Rm is multiplier resistance
Rs is the coil resistance
1
Multiplier resistance Rs is 12.85 kΩ
2
Multiplier resistance Rs is 70 kΩ
3
The applied voltage when the instrument indicates 0.5 FSD is 5 V
4
The applied voltage when the instrument indicated 0.1 FSD is 1 V