Calculate the current required to produce a deflection of 100°, if the coil of a PMMC instrument has 60 turns on a former 18 mm wide, effective length of conductor = 25 mm, moves in a uniform field of flux density 0.5 T, control spring constant = 1.5 × 10-6 Nm/degree.
1
4.56 mA
2
11.11 mA
3
2.56 mA
4
12.43 mA