answersLogoWhite

0


Best Answer

First, a 'Bi-metallic Strip' consisting of two different metals, having different 'Coefficients of Expansion', fused together in a two-layer strip which is connected electrically to the kettle element power supply.

It is placed in a chamber, generally in the kettle handle, where steam from the top of the kettle can come into contact with the chamber holding the metal strip. (Not with the strip itself).

When at room temp., the electrical contacts are closed allowing current to flow to the Element when power is switched on.

When the kettle boils, steam is passed around the chamber that contains the strip, causing it to heat up.

The metal having the higher 'C of E' of the two making up the bi-metal strip, will expand more than the other, causing the strip to bend and open the contacts, thus shutting off the power.

User Avatar

Wiki User

βˆ™ 13y ago
This answer is:
User Avatar
More answers
User Avatar

AnswerBot

βˆ™ 4w ago

An electric kettle usually has a built-in thermostat that detects when the water has reached boiling point. Once the water reaches the desired temperature, the thermostat triggers a switch to turn off the heating element, thus stopping the heating process.

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How does an electric kettle know to switch off when the water is boiling?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Natural Sciences
Related questions

What is happening inside the kettle with water?

Inside the kettle, the water is being heated by an electric element or flame. As the water absorbs heat, its temperature rises and eventually reaches the boiling point, causing it to turn into steam. The pressure from the steam builds up inside the kettle until it forces the steam out through the spout, producing the whistling sound characteristic of a boiling kettle.


How do you use your electric airpot?

Well, the first thing to do when you use your electric pot is to fill it with water. After doing so, you plug the kettle and turn it on. Usually it will light up (usually red color) when you turn the switch on. It will indicate that the kettle is boiling. It will then turn green when the boiling is done.


How does a Crofton Electric Water Kettle work?

A Crofton Electric Water Kettle works by using electricity to heat a coil inside the kettle, which in turn heats the water. The kettle has an auto-shut off feature that turns off the heating element once the water reaches boiling point or a set temperature.


What are the inputs of an electric kettle?

The inputs of an electric kettle typically include water, electricity from a power source, and a switch or button for turning it on/off.


What is boiling water out of a kettle used for?

Boiling water out of a kettle can be used for boiling noodles for soup or spaghetti.


How does the switch of an electrical kettle saves energy?

The switch on an electrical kettle allows you to turn off the kettle when the water has reached boiling point, thereby preventing unnecessary energy consumption. By switching off the kettle promptly, you avoid the kettle continuously drawing power to heat the water beyond the boiling point, saving energy.


In an electric kettle water becomes hot by?

In an electric kettle, water becomes hot by using a heating element that heats up when the kettle is turned on. The heating element transfers heat to the water, raising its temperature until it reaches boiling point.


What is more efficiency electric kettle and electric hotplate?

An electric kettle is generally more efficient than an electric hotplate for boiling water. This is because electric kettles are specifically designed to quickly and efficiently heat water using less energy compared to a hotplate, which is a more versatile but slower option for heating water.


How is a kettle dangerouse?

A kettle can be dangerous if not used properly. Hot water can cause burns if spilled, the boiling water can cause scalding, and steam can cause injuries. Additionally, electric kettles can pose a risk of electric shock if not handled correctly.


What would you add to your water to make it hotter?

You can heat water by boiling it either on the stove or using an electric kettle. Adding anything to water will not make it hotter, but boiling it will increase its temperature.


How does an automatic electric kettle work?

An automatic electric kettle works by using an internal heating element to rapidly heat the water. Once the water reaches the desired temperature, a built-in thermostat automatically shuts off the heating element, preventing the water from boiling over. The kettle then switches to keep the water warm until it is ready to be poured.


What would happen if a kettle is filled to the max while the kettle is boiling?

If a kettle is overfilled while boiling, the boiling water can overflow, causing a mess and potentially a safety hazard. It is best to ensure there is enough space in a kettle to accommodate the water expanding as it boils.