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. 0.443. 0.573. 0.512. 0.649. 0.443. 0.573. 0.512. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging in induction motor occurs when number of stator teeth - number of rotor teeth = even number. number of stator teeth - number of rotor teeth = negative number. number of stator teeth - number of rotor teeth = odd number. number of stator teeth - number of rotor teeth = 0. number of stator teeth - number of rotor teeth = even number. number of stator teeth - number of rotor teeth = negative number. number of stator teeth - number of rotor teeth = odd number. number of stator teeth - number of rotor teeth = 0. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the no-voltage release in a DC motor starter fails to operate on failure of supply, on resumption of supply the motor will not start automatically. develop very low starting torque. get damaged. start automatically without trouble. not start automatically. develop very low starting torque. get damaged. start automatically without trouble. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The principle of operation of a 3 - Φ induction motor is almost similar to that of repulsion start induction motor. synchronous motor. capacitor start induction motor. transformer with secondary short circuited. repulsion start induction motor. synchronous motor. capacitor start induction motor. transformer with secondary short circuited. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field connection of a DC Shunt Motor is changed then it will run in same direction by slowly. it will run in same direction. it will run in opposite direction. motor will not run. it will run in same direction by slowly. it will run in same direction. it will run in opposite direction. motor will not run. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Wave winding is employed in DC machine of high current and low voltage rating. low current and low voltage rating. low current and high voltage rating. high current and low voltage rating. high current and low voltage rating. low current and low voltage rating. low current and high voltage rating. high current and low voltage rating. ANSWER DOWNLOAD EXAMIANS APP
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