What is the concept of notching operation?
(a) process of decreasing the voltage
(b) process of increasing the efficiency
(c) process of cutting out the resistance
(d) process of adding on the resistance
I got this question in homework.
My query is from Motor Starters, Calculation of Resistance Steps & Design of Field Regulators in chapter Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines