Electrical Machines In double cage induction motor, the outer cage offers low resistance and high reactance. high resistance and high reactance. high resistance and low reactance. low resistance and low reactance. low resistance and high reactance. high resistance and high reactance. high resistance and low reactance. low resistance and low reactance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is 40 A. 400 A. 44 A. 440 A. 40 A. 400 A. 44 A. 440 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is 2, 3 ,5 2, 3, 4 1, 2, 3 2, 3, 4, 5 2, 3 ,5 2, 3, 4 1, 2, 3 2, 3, 4, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Width of a carbon brush should be equal to the width of the 2 to 3 commutator segment. the width more than 3 commutator segment. the width of the 1 to 2 commutator segment. less than the width of commutator segment. the width of the 2 to 3 commutator segment. the width more than 3 commutator segment. the width of the 1 to 2 commutator segment. less than the width of commutator segment. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the rotor of a 3 phase induction motor is blocked then the slip is 0.54. 1. 0.3. 0.7. 0.54. 1. 0.3. 0.7. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron increases the hysteresis loss. reduces the saturation magnetization. increases the electrical resistivity of iron. None of these increases the hysteresis loss. reduces the saturation magnetization. increases the electrical resistivity of iron. None of these ANSWER DOWNLOAD EXAMIANS APP
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