Question 530Electricity & Electronics - QMED

70% to pass

By 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
Q@q.QuestionNumber:The electrical diagram shown in figure “B” of the illustration represents what t... Q@q.QuestionNumber:Which of the following statements is true concerning all rotating-field three-ph... Q@q.QuestionNumber:What is the current flow through R1 of the circuit in figure "B" of the illustra... Q@q.QuestionNumber:How would a circuit with a blown fuse be described? Q@q.QuestionNumber:As shown in the illustration of the elementary diagram of a three speed anchor w...

Ready to test your knowledge?

Take a Electricity & Electronics - QMED Practice Exam
Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
← Previous All Questions Next →

Want to practice with timed exams?

Download Coast Guard Exams for the full exam experience.

Get the App