Electrical Machines Maximum power developed depends on load angle reactance both 1and 2 voltage load angle reactance both 1and 2 voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V dc machine has an armature resistance of 1Ω.If the full-load current is 20 A, the differenc in the induced voltages when the machine is running as a motor and as a generator is zero 20 V 50 V 40 V zero 20 V 50 V 40 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In double cage induction motor, the outer cage offers low resistance and low reactance. high resistance and low reactance. high resistance and high reactance. low resistance and high reactance. low resistance and low reactance. high resistance and low reactance. high resistance and high reactance. low resistance and high reactance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding dc machines : 1. possible resistance of shunt-field winding is 1 Ω 2. possible resistance of series-field winding is 1 Ω 3. electrographite brushes are used for 230 V, 10 A machines 4. Copper-graphite brushes are used for 230 V, 10 A machines 5. Possible armature-circuit resistance is 1 Ω From these, the correct statements are 1, 3, 5 2, 3 , 5 1, 4 2, 4 ,5 1, 3, 5 2, 3 , 5 1, 4 2, 4 ,5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are identical as 4% from no load to full load. Consider the governors operating at 50Hz on no load. What is the operating frequency, if the load is 600 MW? 48 Hz 48.5 Hz 45 HZ 50 Hz 48 Hz 48.5 Hz 45 HZ 50 Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power developed by salient pole synchronous machine is/are power due to saliency or reluctance only None of these both 1 and 2 excitation power only power due to saliency or reluctance only None of these both 1 and 2 excitation power only ANSWER DOWNLOAD EXAMIANS APP
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