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If you wish to control a bank of lights in a room from two different locations,...

If you wish to control a bank of lights in a room from two different locations, how many three-way and four-way switches should you us Please draw schematic. You do not have to use both types if you do not need them

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Room1 Room 2 MoinsT Bulb hence it Houss 3 na Switch Neutral or (i) I&位

Here i have used a bulb which is a representation for banks of light.

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