Power Limit on Mains: Why Does This Happen?

AI Thread Summary
When a high-wattage appliance is turned on, it can cause a voltage drop in the circuit, leading to a dimming of connected lightbulbs. This phenomenon occurs due to the resistance in the wires and connections, which results in some voltage loss as higher currents flow through. The effect is a direct application of Ohm's Law, illustrating how electrical resistance impacts voltage levels. This situation can happen even when appliances are plugged into different outlets on the same circuit. Understanding this behavior is crucial for managing electrical loads effectively.
Sakha
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Hi.
Sometimes it happens that if you have a lightbulb and something else that is rated high wattage in the same mains outlet (sometimes even on different outlets), and turn the high-wattage appliance, you can see how the lightbulb gets dimmer.
Why does this happens?

Thanks.
 
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It happens because of voltage drop in the wires/connections. Since no conductor is perfect some voltage is lost when high(er) currents are being carried by said conductors due to their resistance. Ohms law and all...
 
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