Electrical Machines Saving of copper in auto transformer is increased as compared to two winding transformer, when transformation ratio K approaches to zero. infinity. unity. two. zero. infinity. unity. two. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of the dc motor is generally of the range 0.1 ohm. 50 ohm. 0.5 ohm. 100 ohm. 0.1 ohm. 50 ohm. 0.5 ohm. 100 ohm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines shape of net flux density is? peaky in nature saddle shape sine wave flat tapped or trapezoidal peaky in nature saddle shape sine wave flat tapped or trapezoidal ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What will be the eddy current loss if the supply frequency of a transformer becomes double? Four times. Remains same. Doubled. Eight times. Four times. Remains same. Doubled. Eight times. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which slots are used in the rotor of an induction motor? Semi closed slots. Open slots. None of above. Closed slots. Semi closed slots. Open slots. None of above. Closed slots. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Semi closed slots or totally closed slots are used in induction motors, essentially to decrease starting torque improve starting torque increase pull out torque reduce magnetising current and improve power factor decrease starting torque improve starting torque increase pull out torque reduce magnetising current and improve power factor ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS