Connecting a light bulb's electrical contacts to the positive and negative terminals of a battery causes it to turn on and to draw power from the battery. The key to successful connection and operation is matching the bulb's operational range with the battery's voltage.
Contacts differ from bulb to bulb. Some are prongs extending from the bulb's base below the threading while others include a threaded contact and another, smaller one without threads extending from the base. Spring contacts, found in most flashlights, are a good connector.
Good combinations of bulbs and batteries according to capacity include:
Batteries improperly matched to light bulbs will not light the bulbs effectively. If their voltage is too low, the bulb will produce no light. If it is too high, the bulb's filament could be vaporized and the bulb will be rendered useless. A close match might work, but it is unlikely to be as effective as a perfect match between voltage and capacity. Bulbs function inside a target temperature range rather than on a spectrum of effective light production.Learn More
A flicker-flame light bulb is a light bulb that is designed with a carbon filament that oscillates inside the glass and creates a flickering effect. Flicker-flame light bulbs have lower wattage power than standard light bulbs, and the flickering effect can occur only if the bulbs are installed vertically.Full Answer >
According to the California Science Center, a light bulb can work with a lemon by utilizing electrolytes within the lemon as a source of electricity. This is only enough electricity to power a small light, such as a 5 VDC bulb.Full Answer >
A type A light bulb is the typical incandescent light bulb. It has a round top and a tapered bottom that allows it to be screwed into most light fixtures, and it can come in a brightness of 40, 60, 75 or 100 watts, although those wattages are being phased out in favor of lower-wattage, energy-efficient replacements with equivalent brightness.Full Answer >
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 electric current can move through an electric circuit.Full Answer >