How Does a Switch Work?

Last updated at April 25, 2026 by

A switch is a simple device that controls electric current.
When we slide the switch one way, it completes the circuit.
When we slide it the other way, it breaks the circuit.
Example
— Torch switch, room light switch, fan switch.

Switch Positions Position Switch ON Switch OFF Circuit Complete path Broken path Current Flow Electricity flows No electricity flows Lamp Glows bright Does not glow
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CA Maninder Singh is a Chartered Accountant with 16+ years of practical experience and 20+ years of teaching experience. At Teachoo, he simplifies Accounts, Tax and GST with step-by-step examples so students can apply concepts confidently in exams and real life.

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