Electrical Machines The material used for commutator brushes is mostly carbon. copper. cast iron. mica. carbon. copper. cast iron. mica. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Poles of DC machine are often laminated to reduce armature reaction. reduce pulsation loss. reduce iron weight. dissipate more heat. reduce armature reaction. reduce pulsation loss. reduce iron weight. dissipate more heat. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of rotor current of 50 Hz induction motor operating at 4% slip? 2.5Hz 1 Hz 50Hz 2HZ 2.5Hz 1 Hz 50Hz 2HZ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two dc machines A and B, using the same conductor material, have armature circuit resistances of 0.4 Ω and 1.2 Ω respectively. Of the two machines, both are of the same size for the same current rating A is bigger than B for the same voltage rating B is bigger than A for the same current rating A is bigger than B for the same current rating both are of the same size for the same current rating A is bigger than B for the same voltage rating B is bigger than A for the same current rating A is bigger than B for the same current rating ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For small value armature current Ia the torque developed by a DC series motor is proportional to 1/Ia. Ia2. Ia. √Ia. 1/Ia. Ia2. Ia. √Ia. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power of a dc motor is given by EbIa. EbIa2. none of these. EIa. EbIa. EbIa2. none of these. EIa. ANSWER DOWNLOAD EXAMIANS APP