Electrical Machines An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will reduced to half increase by 200% remain unaltered increase by 100% reduced to half increase by 200% remain unaltered increase by 100% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The voltmeter connected across a generator reads voltage same at no load and at full load (rated). The generator is of the type shunt generator. series generator. level compound. short - shunt generator. shunt generator. series generator. level compound. short - shunt generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Tap changer is generally provided in earthing transformer. current transformer. power transformer. voltage transformer. earthing transformer. current transformer. power transformer. voltage transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In the V curve shown in figure below for a synchronous motor, the parameter of Y and X coordinates are, respectively Power factor and field current. Armature current and field current. Armature current and torque. Torque and field current. Power factor and field current. Armature current and field current. Armature current and torque. Torque and field current. 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. 0.512. 0.649. 0.443. 0.573. 0.512. 0.649. 0.443. 0.573. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a transformer is loaded, the secondary terminal voltage drops. That means power factor is unity. lagging. leading. zero. unity. lagging. leading. zero. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS