Question

What will be the effect of reducing load on DC shunt motor?

(a) Speed will increase abruptly

(b) Speed will increase in proportion to reduction in load

(c) Speed will remain almost constant

(d) Speed will reduce

This question was posed to me by my college director while I was bunking the class.

My doubt is from Operating Characteristics of DC Shunt Motor -1 in portion Characteristics of DC Motors of DC Machines

Answer 1

The correct answer is (c) Speed will remain almost constant

The best I can explain: For DC shunt motor, speed-armature current characteristics is called as a shunt characteristic as speed almost remains constant. Thus, by reducing load speed will increase negligibly, thus remaining almost constant.