railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical and Electronics Measurements Indicating Instruments
Which one of the following is the CORRECT expression for voltmeter sensitivity of PMMC type instrument?
1
\(\frac{{{R_m} + {R_s}}}{V}\)
2
\(\frac{{{R_m}{R_s}}}{V}\)
3
\(\frac{{V\left( {{R_m} + {R_s}} \right)}}{{{R_m}{R_s}}}\)
4
\(\frac{{{R_m}{R_s}}}{{V\left( {{R_m} + {R_s}} \right)}}\)