- #1
Apo_GER
- 2
- 0
Moved from a technical forum, so homework template missing
a)
dimension the moving-coil movement so that it indicates full deflection at 25 V
given Values:
Voltage Source: U2Max = 25V;
moving-coil movement: IM = 100µA; UM = 270mV
Rv = ( U2Max - UM ) / IM = (25V - 270mV) / 100 µA = 247,3kΩ
b) the internal resistance is increased by 20 % due to tolerances in production. What does the moving coil movement indicate at an output voltage of 25V
My approach is the following...
RM = UM / IM = 270mV / 100µA = 2700Ω
now: it is 20% higher --> RM.Tol = RM *1,2 = 3240Ω
...
...
The Answer is : The moving coil movement indicates 24.945 V
dimension the moving-coil movement so that it indicates full deflection at 25 V
given Values:
Voltage Source: U2Max = 25V;
moving-coil movement: IM = 100µA; UM = 270mV
Rv = ( U2Max - UM ) / IM = (25V - 270mV) / 100 µA = 247,3kΩ
b) the internal resistance is increased by 20 % due to tolerances in production. What does the moving coil movement indicate at an output voltage of 25V
My approach is the following...
RM = UM / IM = 270mV / 100µA = 2700Ω
now: it is 20% higher --> RM.Tol = RM *1,2 = 3240Ω
...
...
The Answer is : The moving coil movement indicates 24.945 V