Light Bulbs, Batteries, & Circuits
How many volts in lightning?
1 billion volts
How many volts in a D Battery?
1.5 volts
How many volts in a Wall electrical socket
110 or 240 volts
How many volts in a Car Battery
12.6 volts
How do a battery, light bulb and wire have to be configured to light a light bulb.
positive and negative connections
Characteristics of Incandescent Light bulbs
simple, oldest, last only a year, filament is tungsten
Characteristics of a fluorescent bulb?
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.
Definition of electricity?
A form of energy resulting from the existence of charged particles (such as electrons or protons), either statically as an accumulation of charge or dynamically as a current.
what are insulators
An electrical insulator is a material whose internal electric charges do not flow freely
What is an insulator and a conductor?
Conductors and Insulators. In a conductor, electric current can flow freely, in an insulator it cannot. ... "Conductor" implies that the outer electrons of the atoms are loosely bound and free to move through the material. Most atoms hold on to their electrons tightly and are insulators.
What is voltage?
Electrical pressure
Characteristics of LED bulbs
LED - Light Emitting Diode - Low Power Consumption. - Small Size. - Fast Switching. - Physically Robust. - Long Lasting.
Examples of circuits and which ones will light a bulb and which will not?
When a light bulb connects to an electrical power supply, an electrical current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are small packets of visible light.
Characteristics of halogen bulbs
The halogen light bulb or lamp is a type of incandescent lamp which uses a halogengas in order to increase both light output and rated life.
How does a switch work?
When a switch is off, it creates a gap in the circuit so that electrons cannot flow throughout the circuit.
What is current?
The rate of flow of charge
What is the filament made of?
Tungsten
How is a circuit tester used to determine wiring?
Use the two-lead circuit tester to check for voltage. Place one lead on a live/hot wire(usually black, but can be any color other than green or white) and the other on a neutral (white) or ground (green or copper) wire, and the tester's light will turn on. This confirms that you have a good, complete circuit.
What is a switch?
a device that can interrupt the electrical flow in a circuit
Definition of a short circuit? How is one created?
a failure in an electrical circuit when the current takes a short cut. By crossing wires
Definition of a Circuit?
a path for electrical current to follow
What are conductors
conductor, electric current can flow freely
What do light bulbs give off besides light?
heat
