Feeling static

A static shock happens when electric charge builds up on a surface and then moves suddenly between objects with different electric potentials. Friction or contact and separation can transfer charge between materials.

How it works

Dry air often allows charge to remain on a person or object longer. When a conductive path forms, charge redistributes quickly; the brief current and tiny spark may be felt as a shock.

Example or application

Walking across a carpet and then touching a metal doorknob is a common example. The sensation is usually brief, though the same principle can create problems around sensitive electronics or flammable vapors.

Scope and limits

Static effects vary with humidity, clothing, materials, and grounding. Follow workplace procedures where sparks could create a hazard.

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