Electrical Machines
A DC series motor drawing an armature current of Ia is operating under saturated magnetic conditions. The torque developed in the motor is proportional to

 Ia2
 I/Ia2
 Ia
 1/Ia

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

  improve and terminal voltage will rise .
 improve but terminal voltage will fall.
  worsen and terminal voltage will rise.
  worsen and terminal voltage will fall

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
A compound dc generator is delivering full load current at a terminal voltage of 230 V. Its series-field winding gets short circuited. If its terminal voltage 1. becomes more than 230 V, it is overcompounded generator 2. becomes more than 230 V, it is differentially compounded generator 3. becomes less than 230 V, it is overcompounded generator 4. becomes less than 230 V, it is differentially compounded generator 5. becomes less than 230 V, it is level compounded generator From these, the correct answer is

 1, 4, 5
 2, 3, 5
 1, 4
 2,3

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines