Electrical Machines A 4 pole lap wound dc generator has 4 brushes, if one of the brush is damaged, what will be the change in V, I and P ratings V, I and P V/2, I and P/2 V, I/2 and P/2 V/2, I/2 and P/4 V, I and P V/2, I and P/2 V, I/2 and P/2 V/2, I/2 and P/4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Unbalance 3 - Φ stator currents cause heating of rotor. All of these double frequency currents in the rotor. vibrations. heating of rotor. All of these double frequency currents in the rotor. vibrations. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two windings provided on the stator of 1-phase induction motor, one main winding and the other auxiliary winding are connected either of these depending on the design of the motor in series in parallel through inductive coupling either of these depending on the design of the motor in series in parallel through inductive coupling ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a step down transformer which one of the following statements is true? Number of secondary turns is less than primary turns. Number of secondary turns is more than that of primary. Secondary power is less than primary power. Secondary current is less than primary current. Number of secondary turns is less than primary turns. Number of secondary turns is more than that of primary. Secondary power is less than primary power. Secondary current is less than primary current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole DC generator runs at 750 rpm and generate an emf of 240 V. The armature is wave wound and has 792 conductors. If the total flux from each pole is 0.0145 Wb. What is the leakage co-efficient? 1.2. 1.4. 1.8. 1.5. 1.2. 1.4. 1.8. 1.5. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Eg (generated emf) and Eb (back emf) both are different. changes. none of above. same. different. changes. none of above. same. ANSWER DOWNLOAD EXAMIANS APP
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