Electrical Machines A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is 1.9 ohms. 6 ohms. 2.2 ohms. 5.7 ohms. 1.9 ohms. 6 ohms. 2.2 ohms. 5.7 ohms. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the advantages of parallel operation of alternators? All of these Increase efficiency under light load conditions Increase in reliability continuity supply is maintained All of these Increase efficiency under light load conditions Increase in reliability continuity supply is maintained ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 230 V dc series generator is driven at its rated speed. The no-load voltage across its armature terminals would be 230 V somewhat less than 230 V 6 V somewhat more than 230 V 230 V somewhat less than 230 V 6 V somewhat more than 230 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the field-flux axis and armature-mmf axis are respectively along direct axis and interpolar axis quadrature axis and direct axis direct axis and indirect axis quadrature axis and interpolar axis direct axis and interpolar axis quadrature axis and direct axis direct axis and indirect axis quadrature axis and interpolar axis ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The principal of starting of 3 - Φ IM is similar to repulsion motor type starting. capacitor run IM. synchronous motor. transformer with short-circuited secondary. repulsion motor type starting. capacitor run IM. synchronous motor. transformer with short-circuited secondary. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are 1/3, 1/√3 1/√3, 1/√3 1/3, 1/3 1/√3, 1/3 1/3, 1/√3 1/√3, 1/√3 1/3, 1/3 1/√3, 1/3 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS