Electrical Machines The no load current in a transformer lags the applied voltage by about 75°. 0°. 90°. about 115°. about 75°. 0°. 90°. about 115°. 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/2. PN/120. PN/60. PN/3000. PN/2. PN/120. PN/60. PN/3000. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At stand still condition the value of slip is finite value 1 infinite value 0 finite value 1 infinite value 0 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable tan - delta (tanδ) of dielectric dispassion factor of power transformer insulating oil is generally taken as 3 at 90°C. 2 at 90°C. 1 at 90°C. 0.5 at 90°C. 3 at 90°C. 2 at 90°C. 1 at 90°C. 0.5 at 90°C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the excitation of the synchronous generator fails, it acts as a/an synchronous motor. induction generator. synchronous generator. induction motor. synchronous motor. induction generator. synchronous generator. induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A generator may loose residual magnetism due to any of these. vibrations. heating. over excitation. any of these. vibrations. heating. over excitation. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS