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https://oseefoundation.org/2013/05/16/%e0%ae%8e%e0%ae%b3%e0%ae%bf%e0%ae%af-%e0%ae%ae%e0%ae%bf%e0%ae%a9%e0%af%8d%e0%ae%9a%e0%af%81%e0%ae%b1%e0%af%8d%e0%ae%b1%e0%af%81-a-simple-circuit/
எளிய மின்சுற்று (A simple circuit )