Which physical sign is commonly associated with electrical shock?

Burn marks are commonly associated with electrical shock due to the high temperatures generated when electrical current passes through the body. The current can cause tissue damage and burns at the entry and exit points where the electricity enters and exits the skin. This is particularly evident in cases of high-voltage shocks, where the energy can create visible burns, potentially leading to severe injuries.

Other symptoms such as cold sweat, palpitations, and nausea may also occur due to the stress response or physiological changes resulting from the shock, but they do not have the same direct physical manifestation as burn marks do. The presence of burn marks serves as a clear indicator of the injury caused by electricity, making it a significant and defining sign of electrical shock.