This article helps students understand the concepts of electricity and circuits.

Students learn about capacitors and inductors and their role in electrical circuits.

Review the key terms and skills related to voltmeters and ammeters, including where to place them in a circuit.

Review the key terms, equations, and skills related to current, resistance, and resistivity, including how to find the current direction and what resistance depends on.

Review the components of a circuit and their symbols such as battery, resistor, and switch. Analyze how the power of a resistor is related to the current and electric potential difference across the resistor.

Review the key terms, equations, and skills related to Ohm's law, including how electric potential difference, current, and resistance are related.

Review how to find the equivalent resistance for resistors in parallel and series configurations. Recall the current and voltage properties of series and parallel configurations of resistors.

Soldering requires more skill than it looks. As with a lot of practical skills one learns a lot by trail, error and experience. Some tips are discussed here. These notes were written before regulations were introduced requiring solder to...

Explains the design of two circuits that can flash an LED from a single 1.5V battery. A typical LED needs 2-3V to work properly and both these circuits include a voltage doubler to boost the voltage to drive the LED. Both circuits will...

Review the key terms and skills related to Kirchhoff's loop rule, including how to determine the electric potential difference across a component.

Review the key terms and skills related to Kirchhoff's junction rule.

A very simple device to convert light into sound can be made by wiring a solar cell directly to headphones (or an earpiece). The solar cell converts light into electricity and the headphones convert electricity into sound. The limitation...

Find out about the life and work of Gustav Kirchoff, who made contributions to the fundamental understanding of black-body radiation emitted by heated objects, spectroscopy, and electrical circuits.

Explains the design of circuits that can be used to multiply and rectify AC voltages, e.g., to increase voltage in order to light an LED more effectively and get a brighter light from it.

There are so many different types of LEDs on the market (even of the same size and color), how do you tell the difference between them and which one you should use for your particular application? The simple tests descibed here compare...

This article from Khan Academy provides information about capacitors. This information is intended for the Class 12 Physics Course (India).