Electrical Machines Armature reaction in a DC machine is in the same direction as the main poles. makes an angle with the main pole axis which is load dependent. makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. is in the same direction as the main poles. makes an angle with the main pole axis which is load dependent. makes an angle of 90° with the main pole axis. is in direct opposition to the main poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward-Leonard system for controlling the speed of a DC motor is used where The speed in both the direction is required. The accuracy in speed control is required. All of above. Very fine speed control over the whole range from zero to normal speed is required. The speed in both the direction is required. The accuracy in speed control is required. All of above. Very fine speed control over the whole range from zero to normal speed is required. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of rotating magnetic field of 8 pole 50 Hz induction motor is 1500 rpm 1000 rpm 750 rpm 3000 rpm 1500 rpm 1000 rpm 750 rpm 3000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4-pole generator with 16 coil has a two layer lap winding. The pole pitch is 4. 8. 16. 32. 4. 8. 16. 32. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Where the shunt generators are widely used? Where often load fluctuation is occurred. Where voltage variation is needed over a wide load range. Where a constant voltage is required over a narrow load range. Where the load is very high. Where often load fluctuation is occurred. Where voltage variation is needed over a wide load range. Where a constant voltage is required over a narrow load range. Where the load is very high. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1.0 Ω and armature current is 10 A. of the excitation of the machine is reduced by 10%, the extra resistance to be put in the armature circuit to maintain the same speed and torque will be 2 .1 Ω 1.8 9 Ω 1.79 Ω 3.1 Ω 2 .1 Ω 1.8 9 Ω 1.79 Ω 3.1 Ω ANSWER DOWNLOAD EXAMIANS APP
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