At 120 volts, the most common household current in the United States, a 100-watt light bulb draws 0.83 amps. To calculate the amperage of a light bulb, one must divide the number of watts by the volts powering the circui... More »

The power of an electrical system, measured in watts, is equal to its voltage multiplied by its current, measured in amperes, typically shortened to "amps." The current of an electrical system indicates its flow rate, or... More » Home & Garden Home Maintenance Electrical

The average floor box fan uses 100 watts of electricity. A simple method for calculating the wattage of any electrical device is to multiply the amps times the volts. This information is usually found on the back of the ... More »

A light bulb glows because of heat that is caused by electricity as it flows through a filament within the bulb. As the wire heat up, it glows as the result of the temperature. More » Science Physics Electricity

According to an experiment reported at Exploratorium, a pickle can be used as an energy source to power small devices such as a light bulb or buzzer because of its ability to push and pull electrons. The pickle is high i... More »

A potato helps power a light bulb by acting as both a bridge and a separator for two electrodes made of different metals. The two metals most frequently used are zinc and copper because of their ubiquity and difference i... More » Science Physics Electricity

A light bulb circuit works when the electric current flowing through the light bulb combines with the current flowing in the battery or power source. The filament and wires in the light bulb conduct electricity so that e... More »