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The resistance of a wire is proportional to its length so increasing the length would increase the resistance of the wire. The higher the resistance of a wire the lower the voltage will be across the bulb so theoretically, the bulb will be somewhat dimmer.

However, the resistance of a wire is extremely low compared to that of the light bulb. Electrical wiring is designed and installed so that the wire resistance is insignificant compared to the resistance of the load, such as the bulb. In a well planned wiring system, it will be impossible to see any difference in brightness in bulbs regardless of their location in the electrical circuit. In most cases, it will require very sensitive measuring equipment to detect any difference at all.

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Yes, a bulb may appear dimmer when the wire connecting it is longer due to voltage drop along the length of the wire causing less voltage to reach the bulb. This can result in reduced brightness of the bulb. Using a thicker wire or locating the dimmer closer to the bulb can help mitigate this effect.

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Q: Is a bulb dimmer when the wire is longer?
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Continue Learning about Physics

Why when you have a thick wire does the light go dimmer?

A thicker wire can have lower resistance, which allows more current to flow without voltage dropping. This can cause the light to appear dimmer if the current passing through the bulb decreases.


What differene will different length or thichnesses of wire have on the brightness of a bulb?

Thicker or shorter wires will have lower resistance, allowing more current to flow and increasing the brightness of the bulb. Thinner or longer wires will have higher resistance, reducing current flow and dimming the bulb. Ultimately, the length and thickness of the wire will impact the overall electrical resistance in the circuit, affecting the brightness of the bulb.


What did you do to make light bulbs glow dimmer?

To make light bulbs glow dimmer, I reduced the amount of electricity flowing to them by using a dimmer switch or a lower wattage bulb. This decrease in electricity causes the filament in the bulb to emit less light, resulting in a dimmer glow.


What will happen if the tiny wire in a light bulb breaks?

If the tiny wire in a light bulb breaks, the circuit will be interrupted and the light bulb will stop working. The wire, called a filament, is responsible for producing light when electricity passes through it. Without the filament intact, the bulb cannot generate light.


Does the thickness or the length of the wire effect the brightness of the bulb?

The thickness of the wire (resistance) and length of the wire can affect the brightness of the bulb. Thicker wire has less resistance, allowing more current to flow and producing a brighter bulb. Shorter wire lengths also reduce resistance, resulting in a brighter bulb due to more current flowing through it.