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What piece of electrical apparatus is used to change the brightness of a light bulb?
Wiki User
∙ 6y ago
That is called a rheostat or a dimmer.
Wiki User
∙ 6y ago
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How are light bulbs measured?
Brightness of a light bulb depends on the power, current, resistance and size of the filament. Lumens is the unit of measurement for the brightness of a bulb. A bulb has more brightness if there is more power and current. Greater the resistance, less is the brightness.
How are light bulbs efficiency increased?
The brightness of a standard bulb is directly proportional to the amount of voltage drop across the bulb itself. Thus, to increase the brightness :-Pass more current across the bulb by reducing the resistance of the circuitIncrease the voltage across the bulb, or the circuit. Change the supply.
Light bulbs in a series circuit have the same brightness?
If they have the same resistance they will. Kirchhoff's' Law.
How does area of the circuit affect brightness of bulb?
if light is low it can cuase the bulb brightnees.
How to compare the brightness of the old light bulbs to the new energy effiecint bulbs?
Use a phone app like light meter which uses the camera to give a luminosity level.
If the electrical conductivity in an electrical circuit decreases then the brightness of the light bulb does what?
Then the brightness of the light buld increases.
Will the brightness of a light change with the size ooof the battery?
The brightness of the light will change with the voltage of the battery.That's not always related to its physical size.The higher the voltage is, the brighter the light will be, until you reach oneparticular voltage where the light goes out, because you have burned it outwith overvoltage.
Why and how do shadows change?
Shadows are places where the light cant get to, so depending on where the source of light is, the power or brightness of it and the size of the object, the shadow will change.
What is brightness as sound is to light?
Loudness is to brightness as sound is to light.
What changes light to electrical energy?
solar cells are used to change light energy into electrical energy
How do you change brightness in a palm centro?
push the white button and the p. use the arrows.
Why did the light bulb change brightness along the pencil?
because the pencil take the a litte enrgy.
Can the earth be affected if the brightness of the sun changed?
Absolutely, the result in the brightness of the sun would change the temperature, wind, light, and maybe even seasons on Earth
What is brightness in Photoshop?
Brightness refers to amount of light, 100% is maximum light and 0% is minimum light or no light - black.
How does electrical energy change into light energy?
in an led ; in an bulb
What instrument is used to mesure the brightness of light?
Scroll down to related links and look at "Brightness - Wikipedia" and "Light intensity - Wikipedia".
Why speed of light is constant in vaccum?
Because the speed of light is determined by the electrical characteristics of the medium, and the electrical characteristics of vacuum don't change.
