Explanation: Zero-order systems have a constant transfer function. Tacho-generators are working based on induced emf due to the movement of conductors in a magnetic field, developed speed will be proportional to speed and hence transfer function will have a constant value.

Explanation: For consistent and stable conversion of current to mechanical quantities constant current supply is required.

Explanation: Tacho generators are zero order systems, in which transfer function will be a constant value. Kg represents generator constant or back emf constant.

Explanation: Transfer function of force motor is a constant term since, it is a zero-order system. Kf stands for force constant.

Explanation: Electromechanical systems are which converts electrical quantity to mechanical quantity. Most electronic indicating instruments works on this principle, and they are electromechanical instruments.

Explanation: In a DC motor armature current is the essential part of producing rotatory motion, and armature current will be directly proportional to torque output.

Explanation: Electro mechanical systems convert electrical quantity to mechanical quantity and vice versa.

Explanation: Mechanical time constant is given by relation JR / K2, in which R is the armature resistance.

Explanation: Torque speed characteristic of a dc motor has a negative slope with slope Kt/R, is essential for a motor to come to rest when the applied voltage is made zero.

Explanation: In PMMC devices eddy current damping ratio and resistance shows inverse proportionality. As resistance increases, the damping ratio decreases.