Electric Circuits - Mission EC4 Detailed Help

It is more dangerous to touch an outlet when your hands are wet (vs. dry) because wet hands cause ____.

The current (I) in a circuit is dependent upon the electric potential difference (i.e., voltage or V) impressed across the circuit and the overall resistance (R) of the circuit. The equation that expresses this relationship is: 
I = ∆V / R.

An electrical receptacle or outlet in a U.S. home can be used to power electrical devices that are plugged into it. The two slots or holes of an outlet have an electric potential difference of 110 to 120 V. Contact with these holes would impress this electric potential difference across your body or even between one hand and the ground. We have learned that charge will flow between two locations when there is an electric potential difference between those two locations. When failing to follow common sense safety rules regarding the touching of outlets, a person is at risk of electrocution. The current through one's body is further increased when the skin is wet. The wetness of one's skin decreases the resistance to the flow of charge, thus increasing the rate of flow (i.e., increasing the current). Always avoid contact with such receptacles - whether your hands are dry or wet.


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