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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
O que acorda a chaleira? Um clique!
Um adulto põe água fria até a marca.
Põe na base e aperta o botão.
A luz acende; o circuito se fecha.
A corrente cruza o aquecedor isolado.
A resistência faz a energia virar calor.
Mesmo escondido, ele esquenta.
Clique — energia elétrica vira calor.
Calor entra, e a água circula.
Blub-blub — a água toda ferve.
Novo clique — a corrente se desliga.
Um chiado baixinho vem do fundo.
Bolhinhas aparecem lá embaixo.
Água morna sobe; a mais fria desce.
Esse giro espalha bem o calor.
Junto ao bico há névoa de gotinhas.
As bolhas crescem; toda a água ferve.
Calor ou vapor ativa o termostato.
Clique — abre o circuito; a luz apaga.
Clique — energia elétrica vira calor.
Calor entra, e a água circula.
Blub-blub — a água toda ferve.
Novo clique — a corrente se desliga.
Um adulto enche a xícara com cuidado.
Mesmo desligada, a chaleira segue quente.
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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