If excitation of a synchronous motor running with a constant load is decreased from its normal value, ignoring effects of armature reaction, it leads to

Related MCQs

• A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have
• A synchronous motor is running on a load with normal excitation. Now if the load on the motor is increased
• A synchronous motor is running with normal excitation. When the load is increased, the armature current drawn by it increases because
• A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will
• A synchronous motor running with normal excitation adjusts to load increases essentially by increase in
• The effect of increasing the load on a synchronous motor running with normal excitation is to
• If in a synchronous motor, driving mechanical load and drawing current at lagging power factor from constant voltage supply, its field excitation is increased, then its power factor
• If in a synchronous motor, driving a given mechanical load and drawing current at a leading power factor from constant voltage supply its field excitation is increased, its power factor
• In a synchronous motor running with fixed excitation, when the load is increased three times, its torque angle becomes approximately
• As the load is applied to a synchronous motor, the motor takes more armature current because