Informative site that explains the use of computer power supplies, including power supply form factors, power management, power supply connections, checking voltage levels, power supply connectors, power definitions and power supply...

Determine the internal resistance of a battery based on the graph of terminal voltage vs. current. Also find the maximum current and the electrochemical potential.

The voltage in AC circuits oscillates at a rate known as the frequency. With an oscilloscope, see and measure the length of time between signals, and calculate the frequency of an AC signal.

In this activity, students' will use a Voltage Sensor to measure the voltage produced by an electrolyte. They will understand that acids and bases are electrolytes and compare voltages of acids to the voltages of bases. Students' will...

In this activity, students make a battery using different fruits and vegetables, a copper penny, and a zinc washer. They use a voltage probe to collect data on voltage and compare the values of different batteries.

In this activity, students' will use fruits and vegetables to make an electrochemical cell and develop an understanding of how an electrochemical cell works. They will use a voltage sensor to determine which fruits and vegetables produce...

"Juice" is a slang term sometimes used for electricity. Batteries are made up of one or more cells. Cells often consist of two different materials in a solution that are connected to each other by a wire. In this experiment, you will...

A teacher lesson plan which could be easily converted into an idea for a student project or presentation. This page describes an activity in which the water-electricity analogy is used to investigate the relationship between current,...

In this inquiry, students will attempt to build an electrolytic cell which will cause a bulb to turn on then diagram the set-up. Included in this lab, students will experience voltage, solve a problem using the Nernst equation, and...

Wikipedia provides information on Ohm's Law, stating that the voltage drop is proportional to the current running through it.

A superb explanation of how a battery works. Discusses the associated chemistry which explains how a battery produces a voltage. Includes a series of "Confidence Building Questions."

This site details many of the ways in which to measure electricity. Among the topics covered by this page is resistance and voltage as well as electrical energy and Ohm's Law.

This lesson will explain how to calculate voltage, current, and resistance in simple electric circuits. It is 3 of 4 in the series titled "Electric Circuits."

In the everyday electrical devices we use - calculators, remote controls and cell phones - a voltage source such as a battery is required to close the circuit and operate the device. In this hands-on activity, students use a battery,...

By building a basic thermostat, students will explore basic circuitry and electricity. The thermostat built out of a breadboard, temperature sensor chip, amplifier, and battery creates a linear relationship between temperature of the...

Students learn about current electricity and necessary conditions for the existence of an electric current. Students construct a simple electric circuit and a galvanic cell to help them understand voltage, current and resistance.

This page uses a mouse and cheese analogy to show the relationships involved in electricity through currents and charges. Among the topics covered by the analogy are voltage, resistance and electromagnetism.

Determine the rms current and voltage in an RC circuit powered by an AC power supply.

Determine the rms current and voltage in an RL circuit powered by an AC power supply.

Determine the rms current and voltage in an RLC circuit powered by an AC power supply.

Find the terminal voltage of a battery with significant internal resistance. Determine the power of one of the external components for the circuit.

This lab is designed to have students investigate the relationships between voltage, resistance and current in a circuit with only one passive component. The batteries in this simulation can be varied from ideal batteries to batteries...

This lab is designed to have students investigate the relationships between voltage, resistance and current in a parallel circuit with up to three passive components. The batteries in this simulation can be varied from ideal batteries to...

This lab is designed to have students look at the change in the terminal voltage of a battery that occurs as you draw more current from the battery.