Laptop power supplies are class II products, they don't use the earth pin.
The 3rd round plug is the ground connection.
Grounding.
A 2 prong plug won't fit in a 3 prong outlet because the third prong, known as the ground prong, creates a different configuration that prevents the two-prong plug from being inserted. The ground prong is wider than the other two prongs, so a 2 prong plug lacks the necessary space for the third prong to be accommodated.
The third prong in a plug is the ground prong, which is there for safety reasons. It helps prevent electrical shock by providing a path for excess electricity to safely dissipate into the ground.
The third prong, or grounding prong, provides a path for electricity to flow safely into the ground if there is a fault in the electrical system. This helps prevent electric shocks by directing the excess current away from users and reducing the risk of electrical fires.
The third prong in a polarized receptacle is the ground prong, which is used to provide a path for electrical current to safely travel to the ground in the event of a fault or electrical surge. This helps prevent electric shock and protects electronic devices from damage.
The third prong on the bottom of the plug is for "grounding," in case of a short.
The third prong (grounding prong) and ground wire are necessary for safety reasons. They provide a path for excess electric current to safely discharge into the ground, reducing the risk of electrical shock or fire in case of a fault. It helps protect both the appliance user and the appliance itself.
The President is Missing happened in 1988.
The Missing Ring happened in 1982.
The third prong in an electrical plug is the grounding prong, which helps protect electrical devices from damage by providing a path for excess electricity to safely dissipate to the ground. It helps prevent electrical shocks and fires by redirecting these excess currents away from the device.