Question 530Electricity & Electronics - QMED
70% to passBy what means is DC generator output voltage decreased?
Adecreasing armature resistance
Bincreasing field resistance
Cincreasing armature resistance
Ddecreasing field resistance
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
Q481:If a three-phase induction motor is operated under a light load and it develops ... Q260:Capacitors can be used in electric distribution systems to improve power factor.... Q57:Rotor-to-stator air gap readings should be periodically taken for electrical gen... Q513:As shown in the illustration, which brush holder would be appropriate to use in ... Q240:Which of the following statements is correct for the illustrated circuit in figu...
Ready to test your knowledge?
Take a Electricity & Electronics - QMED Practice ExamOfficial Resources