What is the primary function of insulation in electrical systems?

The primary function of insulation in electrical systems is to resist the flow of electric current and prevent short circuits. Insulation materials, such as rubber or plastic, have high electrical resistance, meaning they do not easily allow electricity to pass through them. This characteristic is crucial for ensuring that the electrical currents travel only along the intended pathways, such as within wires or cables. Proper insulation prevents unintended paths for current, which can lead to short circuits that may cause damage, overheating, or even fires.

By effectively containing the electric current, insulation plays a vital role in maintaining the safety and reliability of electrical systems. It also helps prevent electrical shock hazards for users who may come into contact with the equipment. In summary, the correct option highlights the fundamental role of insulation in protecting both the electrical system and its users by preventing the unwanted flow of electricity.