Why a generator slow down with resistive loading?

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A generator slows down with resistive loading due to the increased current demand, which creates an opposing force on the rotor, reducing its speed and causing a frequency drop from 50Hz to about 47Hz. This phenomenon occurs because resistive loads dissipate power, requiring more energy from the generator. In contrast, capacitive and inductive loads primarily introduce reactance without dissipating power, which does not affect the generator's speed in the same way. The discussion emphasizes the difference between resistive loading and reactive loading in terms of their impact on generator performance. Understanding these dynamics is crucial for optimizing generator efficiency.
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anyone here know why a generator slow down with resistive loading ?

i did an experiment and my results showed that when i loaded the generator more and more the frequency dropped from 50Hz to about 47Hz
(power factor was unity all the time)
 
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Consider the induced current in the coil as a result of the turning of the armature. [Read up on the motor effect]. This current experiences a force that is opposite in direction to the motion that induced the current. So this means that when we add a load, more has to be supplied; more current in the coil; a stronger force acts on the rotor but in a direction that opposes the original motion; thus its harder for the motor to turn.
 
but why this doesn't happen when you load using capacitive or inductive loads?
 
eng_pro said:
but why this doesn't happen when you load using capacitive or inductive loads?

because capacitative and inductive loads don't have resistance, only reactance, they don't dissipate power
 

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