Electrical Machines In an induction motor, what is the ratio of rotor input to rotor copper loss? 1/S 1-S S 1/(1-S) 1/S 1-S S 1/(1-S) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following transformer insulating oil generally used in India? Aromatics based insulating oil. Naphtha based insulating oil. Paraffin based insulating oil. Olefin based insulating oil. Aromatics based insulating oil. Naphtha based insulating oil. Paraffin based insulating oil. Olefin based insulating oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the increase in the torque expressed as percentage of initial torque, if current drawn by the dc series motor is increased from 10A to 11A? 41% 10% 21% 11% 41% 10% 21% 11% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 2 pole lap winding dc machine , the resistance of one conductor is 2Ω and total number of conductors is 100. Find the total resistance 200Ω 50Ω 100Ω 10Ω 200Ω 50Ω 100Ω 10Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An 8 pole DC generator has 500 armature conductors and useful flux per pole of 0.065 Wb. What will be the emf generated if it is lap connected and runs at 1000 rpm. What must be the speed at which it is driven to produce the same emf if it is wave wound? 541.67V, 200 rpm. 541.67V, 250 rpm. 2166.67V, 230 rpm. 2166.67V, 270 rpm. 541.67V, 200 rpm. 541.67V, 250 rpm. 2166.67V, 230 rpm. 2166.67V, 270 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a practical synchronous motor the pull out torque will occur when the torque angle is nearly equal to 75°. 30°. 0°. 45°. 75°. 30°. 0°. 45°. ANSWER DOWNLOAD EXAMIANS APP