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Why does the voltage drop as electricity flows through a light bulb?
Wiki User
∙ 14y ago
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.
Wiki User
∙ 14y ago
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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
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 is the name of the gas that electricity flows through in CFL light bulbs?
argon
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.
What gives out a light if an electric current flows through it?
A light bulb in an electric circuit when electricity reaches it.
When electricity flows through a light bulb it is converted into what two forms of energy?
kinetic energy and light energy.
When electricity flows through the metal filament of a light bulb electrical energy is converted to?
Heat, which then produces light.
What is in a light bulb when it's switch is turned on or connected the electricity flows through what we call?
A closed current
What happens to the electricity as it flows through the closed circuit?
Some is changed into light and heat energy and some continues through the curcuit
Property of the filament that makes it light up when electricity flows through it?
Incandescence. The filament is heated by the electricity moving through it, this causes the filament to heat up, and the heat causes the familiar glow.
Can a bulb light up if no electricity is running through to it?
Simply put, no. A light bulb lights up because the filament inside (the thin wire that often breaks) has a lot of resistance in it, then when electricity flows through it, it heats up and glows brightly.
What happens to the energy when you turn on an electric lamp?
Electricity flows through the filament, resistance in the filament causes heat and light energy to be created.
Where does the cuurent go when you switch the light switch off?
Nowhere. That's why the light goes out. Switching a light switch off breaks the circuit, and without a complete circuit, no electricity flows through the lamp.
