Question: Why do I get static shocks when I touch the door knob?
Answer: Static charges build up on shoes when you walk, especially during winter when there is low humidity.
Most modern shoes have highly insulating rubber or plastic soles. As you walk, static charges can build up on the soles of the shoes due to friction. This is especially true if the floor is made up of an insulating material such as nylon. The charge on the shoes soles builds up over time, and when you touch something conductive, such as metal, the static will discharge (or jump) to the other surface and cause a the shock. Humidity in the air reduces the amount of static charge built up, so you don’t notice the shocks in the summer months, and they increase during the winter months.
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