Electrical Machines The heat transfer by convection in a transformer least depends on temperature difference. color of the paint. air velocity. surface area. temperature difference. color of the paint. air velocity. surface area. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In salient pole synchronous machine, maximum power occurs at a load angle of 0° less than 90° Greater than 90° 90° 0° less than 90° Greater than 90° 90° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has synchronous speed of 1500 rpm. What will be the slip when it is running at a speed of 1450 rpm? +3% +3.33% -3.33% -3% +3% +3.33% -3.33% -3% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a lap winding dc machine number of conductors are 100 and number of parallel paths are 10. Find the average pitch 50 1 100 10 50 1 100 10 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the effect of armature reaction ? Armature flux weakens the main field flux. None of the options. Armature flux distorts the main field flux. Both option B and C. Armature flux weakens the main field flux. None of the options. Armature flux distorts the main field flux. Both option B and C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be 2.7 mWb. 1.4 mWb. 3.5 mWb. 1.2 mWb. 2.7 mWb. 1.4 mWb. 3.5 mWb. 1.2 mWb. ANSWER DOWNLOAD EXAMIANS APP
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