Synchronous Motors In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then the motor is said to be fully loaded the excitation is said to be zero per cent the torque generated is maximum the excitation is said to be hundred per cent the motor is said to be fully loaded the excitation is said to be zero per cent the torque generated is maximum the excitation is said to be hundred per cent ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a synchronous motor will ______ as the field excitation is increased. Increase Remain unchanged None of the listed here Decrease Increase Remain unchanged None of the listed here Decrease ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors Leading power factor synchronous motors cost ______ the unity pf motors. Less than More than About the same as None of the listed here Less than More than About the same as None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The magnitude of field flux in a 3-phase synchronous motor Varies with the load Varies with speed Remains constant at all loads Varies with power factor Varies with the load Varies with speed Remains constant at all loads Varies with power factor ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The operating speed of a synchronous motor can be changed to new fixed value by changing the supply voltage changing the load changing frequency using brakes changing the supply voltage changing the load changing frequency using brakes ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that its speed may be controlled more easily its speed is independent of supply frequency None of these its power factor may be varied at will its speed may be controlled more easily its speed is independent of supply frequency None of these its power factor may be varied at will ANSWER DOWNLOAD EXAMIANS APP
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