Lesson: Energy Dissipation by ConductorsPhysics
In this lesson, we will learn how to calculate the dissipation of energy by an electric circuit from its current, its resistance, and the voltage across it.
Sample Question Videos
Worksheet: 25 Questions • 5 Videos
A resistor has a resistance of Ω and dissipates electrical energy at a rate of 2.0 W.
What is the current through the resistor?
What is the voltage drop across the resistor?
What is the maximum voltage that can be safely applied to a 15 kΩ resistor that has a 10 W power rating?
A heart defibrillator produces a current of 10.0 A in a patient’s torso for 5.00 ms in an attempt to restore a normal heartbeat. 500 J of energy was supplied by the defibrillator.
How much charge was passed through the patient?
What voltage was applied to the charge that passed through the patient?
What was the resistance of the path taken by the charge that passed through the patient?