Electrical Machines For a DC Shunt Motor having armature resistance of 0.5 Ω and 2 A armature current at no-load, when the armature current is changed to 20 A at loaded condition the speed is 1000 r.p.m. What is the speed at no-load? 4575.4 r.p.m. 1130 r.p.m. none of above. 1037.5 r.p.m. 4575.4 r.p.m. 1130 r.p.m. none of above. 1037.5 r.p.m. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If we increase the rotor reactance value, the maximum torque will not changed None of these decrease increase not changed None of these decrease increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power developed by a synchronous motor depends on supply voltage and excitation excitation and load angle supply voltage and load angle supply voltage, load angle and excitation supply voltage and excitation excitation and load angle supply voltage and load angle supply voltage, load angle and excitation ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The polarity of a DC generator can be reversed by increasing field current. any of above. reversing the field current. reversing field electric current as well as direction of rotation. increasing field current. any of above. reversing the field current. reversing field electric current as well as direction of rotation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Stability of a synchronous motor ---------- with the increase in excitation. increases any of the above decreases remains unaffected increases any of the above decreases remains unaffected ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point. 33.33 Amp. 44.47 Amp. 29 Amp. 43 Amp. 33.33 Amp. 44.47 Amp. 29 Amp. 43 Amp. ANSWER DOWNLOAD EXAMIANS APP
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