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What happens after the kettle switch clicks? This catchy educational song shows how a closed circuit powers an insulated heater, heat circulates through the water, and a thermostat cuts the current when boiling begins. It also explains why the white mist is made of tiny droplets—and why a hot kettle is for an adult to handle.
Original explanations based on the cited sources.
Electricity
Electric current is a directed flow of electric charge. Electrons carry it in metal wires, while ions can carry it in solutions.
Sources
Electric circuits
A circuit connects electrical parts, such as a battery, wires and a lamp. In a simple battery circuit, current flows when the path is closed.
Sources
Text from the recording’s subtitles.
Song lyrics
¿Qué despierta al hervidor? ¡Un clic!
Un adulto llena con agua fría hasta la marca.
Lo pone en la base y pulsa el botón.
La luz prende; se cierra el circuito.
La corriente pasa por el calefactor aislado.
Su resistencia transforma energía en calor.
Aunque está oculto, se pone caliente.
Clic — electricidad se vuelve calor.
Entra el calor, el agua gira.
Glu-glú — el agua ya hierve.
Clic — la corriente se corta sola.
Un suave shhh se escucha desde abajo.
Burbujas pequeñas crecen en el fondo.
El agua tibia sube; la fría baja.
Su movimiento reparte el calor.
Junto al pico hay neblina de gotitas.
Las burbujas crecen; el agua hierve.
Calor o vapor activa el termostato.
Clic — abre el circuito; la luz se apaga.
Clic — electricidad se vuelve calor.
Entra el calor, el agua gira.
Glu-glú — el agua ya hierve.
Clic — la corriente se corta sola.
Un adulto sirve el agua con cuidado.
Aunque está apagado, sigue muy caliente.
Language version lyrics
What wakes the kettle? Just one click!
An adult fills cool water to the line.
Sets it on the base and flips the switch.
The light shines; now the circuit is closed.
Current flows through the insulated heater.
Its resistance turns electrical energy to heat.
Though out of sight, it starts to grow hot.
Click — electric energy changes to heat.
Heat flows in; the water circles round.
Bubble-bubble — now the water boils.
Click — the current switches itself off.
A quiet shushing rises from below.
Tiny bubbles grow along the bottom.
Warmer water rises; cooler water sinks.
That swirling motion spreads the heat.
At the spout: a mist of tiny droplets.
Bubbles grow; the water starts to boil.
Heat or steam triggers the thermostat.
Click — the circuit opens; light goes dark.
Click — electric energy changes to heat.
Heat flows in; the water circles round.
Bubble-bubble — now the water boils.
Click — the current switches itself off.
An adult safely fills the waiting cup.
Though switched off, the kettle remains hot.
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