Explore how the law of conservation of energy applies to electric circuits. Calculate values for circuits and describe the impact a change will have on a circuit.

Welcome to AP®︎/College Physics 2! In AP Physics 2, you'll learn about thermodynamics, electricity and magnetism, light, and modern physics. To make sure you’re prepared with the …

Explore electrostatic phenomena at a fundamental level, beginning with the model of field forces. Learn how the electric force, like other forces, can be described with Newton’s laws. Apply …

Course: AP®︎/College Physics 2 > Unit 3 Unit test Unit test Electric circuits

Even though Ohm's Law gives you a way to define the resistance, you can determine the resistance of a circuit element by knowing the size and shape of that circuit element.

By using the equation P = I^2 * R and looking only at R you are basically saying that you are holding current constant. In a circuit where current is constant and you change the resistance …

Ohm's Law is V = IR, where V = voltage, I = current, and R = resistance. Ohm's Law allows you to determine characteristics of a circuit, such as how much current is flowing through it, if you …

Let's practice problems involving finding currents and voltages in circuits with pure (series or parallel) combinations of resistors.

The physics archive contains legacy physics content, and is not being updated with new content. For our most up-to-date, mastery-enabled courses, check out Middle School Physics, High …

One of the common uses for capacitors is in DC circuits where you don't want any AC currents to affect its function. You use the capacitor to ground any AC current but not short out the DC …