Question

Which of the following best describes a circuit breaker? a. a device that uses a bimetallic strip to stop a circuit when too much current is going through b. a device that can measure weak spots in a circuit where current does not flow easily c. a single use device that melts when too much current goes through a circuit d. parts on circuit diagrams where one wire passes over another wire

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An AC current has a frequency of 60 Hz. Assume that the current starts at 0 A. At what times will the current be at a peak value (maximum or minimum)?

What is the purpose of Arc Fault Circuit Interrupters (AFCIs)? a. They are safety devices that can detect any differences in the current going into a circuit compared to the current going out and are usually installed in places like bathrooms. b. They are a safety device that prevents sparking from frayed wires that may not set off a circuit breaker. c. They are devices that are used in electric generators and inductors to prevent electricity from arcing toward the magnetic parts. d. They are devices that are used in circuits to create arcing where wires cannot be used.

Answer 1