Question 530Electricity/Electronics - QMED70% to pass
By what means is DC generator output voltage decreased?
AI Explanation
The correct answer is B) increasing field resistance.
Explanation:
The output voltage of a DC generator is determined by the strength of the magnetic field and the speed of the armature. Increasing the field resistance decreases the magnetic field strength, which in turn decreases the generator's output voltage. This is the primary means of controlling the output voltage of a DC generator.
The other options are incorrect because:
A) Decreasing armature resistance would increase the output voltage, not decrease it.
C) Increasing armature resistance would also increase the output voltage, not decrease it.
D) Decreasing field resistance would increase the magnetic field strength and increase the output voltage.
Related Questions
#528 A three-phase electrical system is equipped with ground detecting lamps. If one of the lamps is dark, and remains dark when the test switch is operated, what does this indicate? #529 Which of the terms listed best describes a compound-wound DC generator having a higher voltage at no load than at full load? #531 Which of the following components are used to convert alternating current produced in the DC generator armature windings to direct current? #532 As shown in the illustrated DC machine which is configured as a generator, what type of machine is illustrated in terms of the configuration of the windings? Illustration EL-0052 #533 What is the primary purpose of the brushes of DC generators?