In a DC series generator, the terminal voltage with increase in load will
A. decrease
B. increase gradually and then stay at rated voltage
C. increase to rated voltage and then may decrease
D. remain nearly constant
Answer: C
Share your understanding of this question with the correct explanation.
In a DC series generator, the terminal voltage will increase with an increase in load up to a certain point and then may decrease. This behavior is due to the inherent characteristics of the series-wound generator.
Initially, as the load increases, the armature current also increases. Since the field winding and armature winding are in series, the increase in armature current results in an increase in the magnetic field produced by the field winding. This leads to an increase in the generated voltage, causing the terminal voltage to rise.
However, there is a limit to the capacity of the generator to provide a higher current. Beyond a certain load point, the generator reaches its maximum capacity, and the terminal voltage may start to decrease due to voltage drops across the armature resistance and other factors.
Therefore, the correct answer is:
C. The terminal voltage will increase to the rated voltage and then may decrease.