Electrical Machines A 3 - Φ, 400 / 200 V, Y - Y connected wound rotor induction motor has 0.06 Ω rotor resistance and 0.3 Ω standstill reactance per phase. To make the starting torque equal to maximum torque of the motor the additional resistance required 0.66 Ω. 0.78 Ω. 0.24 Ω. 0.45 Ω. 0.66 Ω. 0.78 Ω. 0.24 Ω. 0.45 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In circle diagram for induction motor, diameter of circle represents which of the following ? Line voltage. Slip. Running torque. Rotor current. Line voltage. Slip. Running torque. Rotor current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard system, the lower limit of the speed imposed by Armature resistance. Residual magnetism of the generator. Field resistance. None of above. Armature resistance. Residual magnetism of the generator. Field resistance. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 240 V, dc shunt motor draws 15 A while supplying the rated load at a speed of 80 rad/s. The armature resistance is 0.5 W and the field winding resistance is 80 W. The external resistance to be added in the armature circuit to limit the armature current to 125% of its rated value is 15.1 Ω 31.1 Ω 15.9 Ω 31.9 Ω 15.1 Ω 31.1 Ω 15.9 Ω 31.9 Ω ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used. Rheostatic control. Any of above method. Ward Leonard control. None of above. Rheostatic control. Any of above method. Ward Leonard control. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which is the arrangement of windings in a core type single phase transformer? Half hv inside and half lv outside on each core limb Lv on one core limb and hv on the other Sandwiched lv and hv discs on each core limb Half lv inside and half hv outside on each core limb Half hv inside and half lv outside on each core limb Lv on one core limb and hv on the other Sandwiched lv and hv discs on each core limb Half lv inside and half hv outside on each core limb ANSWER DOWNLOAD EXAMIANS APP
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