Electrical Machines
A self-excited shunt generator fails to build up, because 1. the field circuit is open 2. The armature circuit is open 3. the residual magnetism is absent 4. The direction of rotation is wrong From these, the correct answer is

 1, 2 and 3
 3 only
 1, 2, 3 and 4
 1, 3

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In case of a DC Shunt motor if the load is decreased to some extent, what will happen to its speed?

 The speed will increase gradually.
 The speed will increase in proportion to reduction in load.
 The speed will increase abruptly.
 The speed will remains almost constant.

ANSWER DOWNLOAD EXAMIANS APP