Electrical Machines Normally for the design of transformer the ambient temperature is taken as 27°C. 35°C. 45°C. 32°C. 27°C. 35°C. 45°C. 32°C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature flux is.............with respect to main field flux or main field poles? None of these rotates opposite direction rotates same direction stationary None of these rotates opposite direction rotates same direction stationary ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes 1/2 of the initial value 1/4 of the intial value twice the initial value 4 time the initial value 1/2 of the initial value 1/4 of the intial value twice the initial value 4 time the initial value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V dc series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 Ω. The value of resistance which must be added to obtain rated torque at 1000 rpm is 6 Ω 2.2 Ω 5.7 Ω 1.9 Ω 6 Ω 2.2 Ω 5.7 Ω 1.9 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the armature current of 5 Amp is flowing through the dc motor the torque produced is 47 Nm. Keeping the speed constant if the armature current is increased to 7 amp, calculate the new torque. Assume losses to be constant. 74 Nm. 27.73 Nm . 65.8 Nm. 38.5 Nm. 74 Nm. 27.73 Nm . 65.8 Nm. 38.5 Nm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an auto-transformer, power is transferred through None of these induction process only. both A and B. conduction process only. None of these induction process only. both A and B. conduction process only. ANSWER DOWNLOAD EXAMIANS APP
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