Question

Calculate the conduction angle in purely inductive load if the firing angle is π÷2.

(a) 205°

(b) 175°

(c) 180°

(d) 195°

The question was posed to me by my school principal while I was bunking the class.

The doubt is from Solid State Controlled Drives in section Introduction to Solid State Controlled Drives of Electric Drives

Answer 1

The correct choice is (c) 180°

For explanation I would say: The conduction angle in the purely inductive load is β-α=2(π-∝)=2(180°-90°). The conduction angle is the angle for which the current exists in the circuit. The average value of the voltage in a purely inductive load is zero.