I saw a few youtube videos explaining that electricity doesn’t actually travel through wires but directly to the bulb from the battery. I understood their explanation. But now I have a doubt. Since energy flows directly to the bulb, can I shield the bulb in some way such that the circuit is complete and even then the bulb doesn’t light up?
In: Physics
No that’s not possible. A shield where a wire goes through isn’t a working shield against EM. Also I know the video you mean.
Right in the end there is a little hint about “wave resistance (impedance) of the wire”. The time until the “full” electricity reaches the bulb depends on the wire, just the first bit of energy is travelling through air, and you could indeed shield that to delay the light turning on by a few microseconds
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