eye on physics

Electricity and Magnetism Level 1

After scraping your feet against a carpet or rug, you often get a shock when touching a metal object. This shock is due to which of the following?

The net electric charge you've built up in your body escaping. Newton's third law, for every action there is an equal and opposite reaction. A net magnetic field you've generated by scraping your feet. Heat from the friction between your feet and the carpet escaping your body.