Electrical Machines In case of induction motors the ratio of length to pole pitch for minimum cost, is taken as 1.5 to 2. 1.0. 2 to 3. 3 to 5. 1.5 to 2. 1.0. 2 to 3. 3 to 5. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms. 0.649. 0.573. 0.512. 0.443. 0.649. 0.573. 0.512. 0.443. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following, voltage regulation may be zero or negative leading power factor lagging power factor All of these unity power factor leading power factor lagging power factor All of these unity power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC Shunt Motor has disadvantage(s) of none of above. constant speed. not suitable for rapidly changing loads. less expensive. none of above. constant speed. not suitable for rapidly changing loads. less expensive. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer operating at constant voltage if the input frequency increases, the core loss None of these decrease. remains constant. increase. None of these decrease. remains constant. increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a DC cummulative compound wound motor is loaded Torque decrease and speed increases. Torque and speed both increase. Torque increase and speed decrease. Both torque and speed decrease. Torque decrease and speed increases. Torque and speed both increase. Torque increase and speed decrease. Both torque and speed decrease. ANSWER DOWNLOAD EXAMIANS APP
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