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Do you mean why is the voltage in a circuit lower after the light bulb than before it? If so, it's because the light bulb filament has electrical resistance. When an electrical current flows through a resistance, there is a voltage drop across the resistance (Ohm's law).
More fundamentally, the light bulb is producing light, which is a form of energy. The voltage drop across the light bulb comes from the fact that electrical energy is being turned into light. If voltage didn't drop, you would be producing energy from nothing. Furthermore, if there were no voltage drop, your circuit would behave the same whether you had no light bulbs, one light bulb, or eighteen million light bulbs - something that clearly can't be the case.
What else can I help you with?
Which was invented first the light bulb or electricity?
electricity because a light bulb needs electricity
What are the similarities between incandescent and fluorescent light bulbs?
They both produce light, they run on electricity, they're made out of glass and they contain argon under low pressure. Fluorescent lights are better because they last longer and are more energy efficient! :) -kelly.t (:
When a light bulb is rated for 3.2 V does that mean that is the maximum operating voltage OR the minimum operating voltage OR or the optimum operating voltage?
When a light bulb is rated for 3.2 V it means that it is the maximum operating voltage to be applied to the bulb.
What emits light when the current flows from the anode to the cathode?
lioght
Is the amount of current that flows in the wire of electric circuit the same as the current that flows in the filament of the light connected in that circuit?
yes
What happens to the filament when electricity flows through?
When electricity flows through the filament in a light bulb, it heats up due to resistance, becoming white-hot and producing visible light. This light is what we see when we turn on a light bulb.
How does electricity flow through a light?
A voltage is applied across the terminals of the light fixture to which the bulb is attached by two terminals, hot and neutral. A current then flows through the bulb. In an incandescent light the filament wire heats up and glows.
What happens when electricity flows through the filament in a light bulb?
When electricity flows through the filament in a light bulb, the filament becomes very hot and starts to emit light due to the process of incandescence. The electricity heats up the filament to a high temperature, causing it to glow and produce light.
What is the name of the gas that electricity flows through in CFL light bulbs?
argon
What provides the energy to light a light bulb?
Electricity provides the energy to light a light bulb. When the electricity flows through the filament in the bulb, it generates heat and light.
What lights up when electricity flows through?
Electricity flows through the path of least resistance. Electricity will flow through anything conductive; metals, liquids, and even through small particles. Your insulators are porcelain, glass, plastics, wood and cloths. All variances of voltage is deadly. The most dangerous thingabout electricity is the current or amperage. As little as 17 miliamps can stop your heart.
Where does the electricity go in a light bulb?
Electricity flows through the filament of a light bulb, heating it up and causing it to emit light. The electricity powers the light bulb, allowing it to produce illumination.
Is electricity a light source?
Electricity itself is not a light source, but it can power light sources such as light bulbs, LEDs, and fluorescent tubes that produce light. When electricity flows through these devices, it generates light energy.
What gives out a light if an electric current flows through it?
A light bulb in an electric circuit when electricity reaches it.
What is the path taken by electricity through a light bulb?
Electricity flows from the power source through the wires connected to the light bulb's terminals. The electricity then passes through the filament inside the light bulb, which heats up and produces light. Finally, the electricity exits the light bulb and returns to the power source through the wiring.
What is the source of energy in a light bulb?
Electricity is the source of energy in a light bulb.
When electricity flows through a light bulb it is converted into what two forms of energy?
kinetic energy and light energy.
