[Free Registration/Login may be required to access all resource tools.] Students are introduced to the ammeter, which measures electrical current, and to the voltmeter, which measures voltage.

Electrical currents and voltage are defined and illustrated.

Determine the voltage of the battery based on the colors of the resistors and the current in a combination circuit.

Determine the voltage of the battery based on the colors of the resistor and the current in the circuit.

Determine the voltage of the battery based on the colors of the resistors and the current in the series circuit.

Determine the voltage of the battery based on the colors of the resistors and the current in the parallel circuit.

Determine the net voltage from two charges.

Determine the net voltage from two charges.

Take a look inside a battery and change the voltage to see what goes on inside. Read the voltmeter as little stick people move the charges from one end of the battery to the other.

Build an intuitive understanding of current and voltage, and power.

This article explains what voltage and amperage are and the effect batteries have on them in an electrical circuit.

Illustrated explanation of voltage, current, and resistance and the relationship between them.

Whether you are looking for an introduction to resistors, volt, and current, or just looking for a reference, this article provides great information for all ability levels. Great videos, diagrams, images, and links to more information...

Determine the internal resistance of a battery based on the electrochemical potential and the voltage that is measured at the terminals of the battery when it is being used.

Determine the voltage of the battery based on the colors of the resistors and the current in a combination circuit.

Measuring voltage drops across resistances in series-parallel circuits requires an understanding of both series and parallel circuit behavior. Learn more with this tutorial.

Measuring the voltage in a circuit is like measuring the drop in pressure across two points. Learn more with this tutorial.

Find out how measuring voltage in a circuit is like measuring the pressure in a water pipe.

Use this tutorial to find the voltage in an electrical current with Ohm's Law.

See how Ohm's Law can tell us that the voltage across resistors will depend on that current value I and each R-value.

Use the series and parallel resistance formulas to determine the total resistances of the parts. Then, use Ohm's Law to calculate the voltage drops across each part.

In this simulation a battery will be used to charge a capacitor. The capacitor will then be used to operate a light bulb until the capacitor is discharged.

See how a typical DC power supply provides a variable voltage source for DC circuits.

Find out how the SPARKS DMM can measure AC voltage and current.