Electrical Machines Hopkinss test in DC motor is conducted at ? Low load. None of these. No load. Full load. Low load. None of these. No load. Full load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the reason for stationary armature essential in alternators above 5 KVA? Collecting of large current is simple. All of these Insulation requirement is less. Operating cost is less. Collecting of large current is simple. All of these Insulation requirement is less. Operating cost is less. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss remains constant. decrease. None of these increase. remains constant. decrease. None of these increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature shaft must be able to with stand All of these Bending moment due to weight of the armature. Twisting stains due to transmission of torque. Any unbalanced magnetic pull on the armature core. All of these Bending moment due to weight of the armature. Twisting stains due to transmission of torque. Any unbalanced magnetic pull on the armature core. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are effects of armature reaction? increase the maintenance and repair increase the iron loss All of these increases the design cost increase the maintenance and repair increase the iron loss All of these increases the design cost ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by the a 230 V DC motor of armature resistance 0.5 Ω and back emf 200 V is 660 40 600 60 660 40 600 60 ANSWER DOWNLOAD EXAMIANS APP
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