Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to residual flux. high speed. high field resistance. magnetic inertia. residual flux. high speed. high field resistance. magnetic inertia. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At slip s = 1 torque developed in machine is electromagnetic torque. starting torque. none. maximum torque. electromagnetic torque. starting torque. none. maximum torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The stator frame in an induction motor is used to ventilate the armature. provide return path for the flux. protect the whole machine. hold armature stamping in position. ventilate the armature. provide return path for the flux. protect the whole machine. hold armature stamping in position. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The ___________________ generator has the poorest voltage regulation. over compounded. shunt. differential compounded. under-compounded. over compounded. shunt. differential compounded. under-compounded. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point. 29 Amp. 44.47 Amp. 43 Amp. 33.33 Amp. 29 Amp. 44.47 Amp. 43 Amp. 33.33 Amp. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC Motor for constant load torque, what will happen to the armature current if armature resistance increases? Increases. Remain unchanged Decreases. None of above. Increases. Remain unchanged Decreases. None of above. ANSWER DOWNLOAD EXAMIANS APP
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