Question 1026 of 749 · Maryland Journeyperson Electrician Exam
A material that offers very high resistance to current flow, such as glass or rubber, is called:
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 1026
- D: An insulator
Explanation
Insulators have very few free electrons and therefore a very high resistance. They are used to separate and protect energized conductors.
More questions: Definitions, Theory and Plans
- 1027In the United States, the standard frequency of the utility supply is:
- 1028The RMS (effective) value of an AC voltage is the value that:
- 1029A 120-volt RMS sine wave has a peak voltage of approximately:
- 1030Power factor in an AC circuit is the ratio of:
- 1031In a purely resistive AC circuit, such as an incandescent lamp, the power factor is:
- 1032In a circuit that is mainly inductive, such as a motor winding, the current: