Ohm's law expresses the relationship among which quantities?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Prepare for the Lineman's Test C with our study resources. Use flashcards and multiple choice questions to enhance your understanding. Get ready to pass with confidence!

Multiple Choice

Ohm's law expresses the relationship among which quantities?

Explanation:
Voltage, current, and resistance relate in a straightforward way for many conductors: when a voltage is applied across a resistor, the current through it changes in proportion to that voltage, with the resistance setting the proportionality. This is captured by V = IR, so current is V divided by R and voltage is IR. If the material is ohmic and temperature remains roughly constant, the relationship is linear, meaning the resistance stays constant across the range you’re measuring. The other laws describe different phenomena: Lenz's law concerns the direction of induced current to oppose a change in magnetic flux; Joule's law explains how electrical energy turns into heat in a conductor (P = I^2R or P = V^2/R); Faraday's law describes how a changing magnetic flux induces an electromotive force.

Voltage, current, and resistance relate in a straightforward way for many conductors: when a voltage is applied across a resistor, the current through it changes in proportion to that voltage, with the resistance setting the proportionality. This is captured by V = IR, so current is V divided by R and voltage is IR. If the material is ohmic and temperature remains roughly constant, the relationship is linear, meaning the resistance stays constant across the range you’re measuring.

The other laws describe different phenomena: Lenz's law concerns the direction of induced current to oppose a change in magnetic flux; Joule's law explains how electrical energy turns into heat in a conductor (P = I^2R or P = V^2/R); Faraday's law describes how a changing magnetic flux induces an electromotive force.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy