Electrical Machines Eg (generated emf) and Eb (back emf) both are changes. same. different. none of above. changes. same. different. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The low voltage winding of a 400/230 V single phase 50 Hz transformer is to be connected to keep the magnetization current at the same level in both the cases the voltage at 25 Hz should be 230 V 460 V 65 V 115 V 230 V 460 V 65 V 115 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If a DC Series motor is connected across an AC supply it will burn. not run. run at lower speed. run at normal speed. burn. not run. run at lower speed. run at normal speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature of DC machine is made of conducting material. insulating material. silicon steel. non-ferrous material. conducting material. insulating material. silicon steel. non-ferrous material. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc series motor driving and electric train faces a constant power load. It is running at rated speed and rated voltage. If the speed has to be brought down to 0.25 p.u. the supply voltage has to be approximately brought down to 0.75 p.u 0.5 p.u 0.125 p.u 0.25 p.u 0.75 p.u 0.5 p.u 0.125 p.u 0.25 p.u ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor, the starting torque developed is proportional to 1/V 1/V² V² supply voltage V 1/V 1/V² V² supply voltage V ANSWER DOWNLOAD EXAMIANS APP
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