Insulator

An insulator is a material that resists the flow of electrical current or heat. In electricity, insulators like rubber, plastic, or glass prevent electric charges from passing through, protecting people from shock and keeping electricity contained within wires. For heat, insulators such as foam or wool slow down the transfer of warmth, helping maintain desired temperatures. Essentially, insulators act as barriers that reduce energy transfer, making systems safer and more efficient by controlling where and how energy moves.