Switch is always connected to the _____ wire.

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answer is A.

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Detailed Solution

Concept: Switch is an electrical component that checks the flow of current through a circuit. Also, remember that a live wire is a wire through which the current is passing through from a high potential. It is a fragment of household sockets that carries electricity from large-scale power plants.
A live wire is that which passes current or electricity incessantly to the sockets to which we plug-in appliances. Now, the switches that we allocate to sockets are generally connected to the live wire in the socket. This is to certify that current is sent to the socket only when the user turns on the switch, and as soon as the switch is turned off, no current is supplied to the socket. This is done as a safety precaution to ensure that electricity flows into the terminals of the socket only when required by the user and when the switch is off, there is an open circuit that breaks the flow of electricity to the circuit, making sure that no live current exists in the socket.
Hence, option 1 is correct.

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