Electrical Machines In synchronous generator a synchronous dead load (lamp, furnaces etc) has no ____________ hence it has no natural frequency of oscillation. restoring torque. mechanical rotatory system. synchronizing power co efficient. damping torque. restoring torque. mechanical rotatory system. synchronizing power co efficient. damping torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of a dc motor the ratio Eb / E is indicative of ratio of starting to running torque. ratio of input to output voltage. ratio of starting to running current. efficiency. ratio of starting to running torque. ratio of input to output voltage. ratio of starting to running current. efficiency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutators in DC machines have a role of which converts Both AC to DC and DC to AC. AC to DC. high voltage DC to low voltage DC. none of these. Both AC to DC and DC to AC. AC to DC. high voltage DC to low voltage DC. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the commutator pitch? Number of commutator segments between two successive coils. Number of conductors spanned by one coil at the front end of the armature. Number of conductors spanned by one coil at the back end of the armature. The distance between the staring of first coil and its next successive coil Number of commutator segments between two successive coils. Number of conductors spanned by one coil at the front end of the armature. Number of conductors spanned by one coil at the back end of the armature. The distance between the staring of first coil and its next successive coil ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has maximum efficiency at 3/4 load. The ratio of iron loss and full load copper loss is 3/4. 9/16. 4/3. 16/9. 3/4. 9/16. 4/3. 16/9. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous generator, inverted V curve is drawn between field current on X-axis and power factor on Y-axis field current on X-axis and armature current on Y-axis field current on Y-axis and armature current on X-axis field current on Y-axis and power factor on X-axis field current on X-axis and power factor on Y-axis field current on X-axis and armature current on Y-axis field current on Y-axis and armature current on X-axis field current on Y-axis and power factor on X-axis ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS