Electrical Machines In an auto transformer, for what value of turn ratio, power transferred by inductively and conductively are same? 0 0.5 any of the above 1 0 0.5 any of the above 1 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In shunt dc motor the direction of rotation of the motor will reversed. When only armature terminals are reversed. only field terminals are changed. none of above. either field terminals are reversed or armature terminals are reversed. only armature terminals are reversed. only field terminals are changed. none of above. either field terminals are reversed or armature terminals are reversed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A cumulatively compounded dc motor delivers rated load power at rated speed. If the series field is short-circuited, then Ia remains constant but ωm increase Ia increases and ωm decreses both armature current Ia and speed ωm increase both decrese Ia remains constant but ωm increase Ia increases and ωm decreses both armature current Ia and speed ωm increase both decrese ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Minimum allowable resistivity of power transformer insulating oil is generally taken as 1 X 1012 Ω - cm at 27°C and 0.1 X 1012 3 X 1012 Ω - cm at 27°C and 0.3 X 1012 2 X 1012 Ω - cm at 27°C and 0.2 X 1012 4 X 1012 Ω - cm at 27°C and 0.4 X 1012 1 X 1012 Ω - cm at 27°C and 0.1 X 1012 3 X 1012 Ω - cm at 27°C and 0.3 X 1012 2 X 1012 Ω - cm at 27°C and 0.2 X 1012 4 X 1012 Ω - cm at 27°C and 0.4 X 1012 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer the magnetic coupling between the primary and secondary winding can be increased by using soft material for winding. increasing the number of turns. using the magnetic core of low reluctance. using transformer oil of better quality. using soft material for winding. increasing the number of turns. using the magnetic core of low reluctance. using transformer oil of better quality. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The emf induced in a conductor rotating in a bipolar field is DC. AC. both of above. None of these DC. AC. both of above. None of these ANSWER DOWNLOAD EXAMIANS APP
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