A system contains an amplifier with a gain of 10 offering the armature voltage for a motor which provides an output speed which is proportional to the armature voltage, the constant of proportionality being 5 (rev/s)/V.
What is the relationship among the input voltage to the system and the output motor speed?
Solution: The overall gain G = G1 x G2 = 10 x 5 = 50 (rev/s)/V.