Multiple Choice Questions on Electrical Machines -1
Important Multiple Choice Questions in Electrical Machines 1. In an electromechanical energy conversion device, the developed torque depends upon A) Stator field strength and torque angle B) Stator field and rotor field strengths C) Stator field and rotor field strengths and the torque angle D) Stator field strength only 2. Consider the following statements: The use of interpoles in dc machines is to counteract the I. Reactance voltage II. Demagnetizing effect of armature mmf in the commutating zone III. Cross-magnetizing effect of armature mmf in the commutating zone Which of these statement(s) is/are correct? A) 1 &2 B) 2&3 C) 1&3 D) 3 alone 3. The current drawn by a 220V DC motor of armature resistance 0.5 ohm and back emf 200V is A) 40A