# How does electricity gets to the light when you switch it on?

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When you turn a light switch on, the electricity flows through a tiny wire in the bulb, which gets very hot and makes the gas in the bulb glow. … It’s the same with your TV – when you turn it on, you’re closing the circuit, so electricity flows to the TV set and causes it to turn on with pictures and sound.

The electricity leaves the power station, usually through overhead lines, and makes its way to a large substation. These are normally located not too far from the power station. … The electricity then leaves the first substation via overhead power transmission lines supported by pylons, or via underground cables.

## What happens when you flip a light switch?

Flipping a light switch to turn on a light means that the circuit with the light is being closed. When the switch is flipped the opposite way, to turn the light off, the circuit is being opened.

## Is it better to run power to light or switch?

Given 14/3 is more expensive than 14/2, in most cases, I’d say run power to the switch first unless it’s substantially father away from the power source than the lights (eg: the power-supplying wire passes your lights, then you have to double back with power to the lights).

Electricity always returns to the source of the power supply (a transformer or substation). … When electrical current cannot flow through a neutral conductor, due to some type of damage or defect in the circuit, more current will use a path through the earth to return to the power supply.

## How fast does electricity travel through power lines?

In the case of an electrical cord connecting a table lamp or some other household item to a power source, the copper wire inside the cord acts as the conductor. This energy travels as electromagnetic waves at about the speed of light, which is 670,616,629 miles per hour,1 or 300 million meters per second.

## How far can you transmit electricity?

A typical maximum transmission distance is about 300 miles (483 km). High-voltage transmission lines are quite obvious when you see them. They are normally made of huge steel towers like this: All power towers like this have three wires for the three phases.

## How is electricity transmitted over long distances?

Produced from fossil fuels, nuclear fuels and renewable energy sources, electricity can be sent over long distances from power plants through transmission line with minimal loss. … Transmission lines are bundles of wires, known as conductors, that ship electric power from power plants to distant substations.