Question

why do aed pads need to be placed one inch away from jewelry or pacemakers?
the metals will melt and spread in the body if the aed is placed closer.
the metals will heat up and cause skin burns if the aed is placed closer.
electricity cannot travel through metals if the aed is placed closer.
electricity will make the heart beat faster if the aed is placed closer.

Explanation:

When AED (Automated External Defibrillator) pads are placed too close (less than one inch) to jewelry or pacemakers (which contain metals), the electrical current from the AED can cause the metals to heat up. This heating can lead to skin burns. Metals are good conductors of electricity, and the electrical energy from the AED can be converted into heat energy when in close - proximity to metals.
Melting of metals in the body from AED use is highly unlikely as the energy and temperature generated are not sufficient for that. Electricity can travel through metals (they are conductors), so the claim that electricity cannot travel through metals if placed closer is wrong. Also, the main concern is not about the heart beating faster due to proximity but about the local heating effect on the skin from the metal objects.

Answer:

The metals will heat up and cause skin burns if the AED is placed closer.