Which of the following is NOT a benefit of using rubber goods in electrical applications?

In electrical applications, rubber goods are widely used primarily for their insulation properties and safety features. The correct answer highlights that mechanical strength is not a primary benefit of rubber when compared to other materials commonly used in electrical contexts.

Rubber is primarily valued for its excellent electrical insulation capabilities, which help to prevent accidental contact with live parts, thereby enhancing safety. It can also provide an effective barrier against electrical currents, minimizing the risk of shocks or short circuits. Cost-effectiveness may be a consideration in some instances, but it is not associated with the physical attributes of rubber itself in terms of mechanical strength.

Rubber isn't typically known for providing significant mechanical strength, especially compared to materials like plastics or metals, which may offer superior durability and structural integrity in applications requiring resistance to physical stress. Thus, while rubber serves critical functions in electrical safety and insulation, its mechanical attributes are not its strong suit.