Electrical Machines Induction motors normally use cast aluminium rotor because aluminium is lighter in weight. cheaper in cost. easy to cast owing to its low melting point and is easily available. of low resistivity. lighter in weight. cheaper in cost. easy to cast owing to its low melting point and is easily available. of low resistivity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp? 60 V. 90 V. 40 V. 30 V. 60 V. 90 V. 40 V. 30 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will increase by 100% remain unaltered increase by 200% reduced to half increase by 100% remain unaltered increase by 200% reduced to half ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When pure inductive load is connected to the alternator, what is the effect of armature reaction? Demagnetization Magnetization None of these Cross magnetization Demagnetization Magnetization None of these Cross magnetization ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Voltage regulation of transformer is given by (V2 - E2) / V2 (E2 - V2) / E2 (V2 - E2) / E2 (E2 - V2) / V2 (V2 - E2) / V2 (E2 - V2) / E2 (V2 - E2) / E2 (E2 - V2) / V2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/120. PN/2. PN/60. PN/3000. PN/120. PN/2. PN/60. PN/3000. ANSWER DOWNLOAD EXAMIANS APP
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