Which of the following are used to measure electrical resistance?

Prepare for the LADWP Electrical Craft Helper Test with helpful materials. Access quizzes, flashcards, and detailed explanations to enhance your study sessions and boost your exam readiness today!

The correct choice involves the use of a megohmmeter and an ohmmeter, both of which are specifically designed to measure electrical resistance.

A megohmmeter, often referred to as a "megger," is used to measure high resistance values, typically in the megohm range. It applies a constant test voltage to the component being tested and measures the ensuing current to calculate resistance. This is particularly useful in assessing insulation resistance in cables and electrical equipment, ensuring safe operation.

An ohmmeter is a simpler device that measures resistance directly in ohms. It usually operates on the principle of passing a small and controlled current through the resistor and measuring the voltage across it to compute the resistance based on Ohm's Law.

These tools are essential for diagnosing electrical issues, verifying component specifications, and ensuring that circuits are safe and functional. Thus, this combination of devices provides a comprehensive approach to measuring resistance across various ranges and applications.

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy