Compounds made of porcelain and plastic are used as

• A. Insulators
• B. Conductors
• C. Shields
• D. Terminals

Answer: (A)

Porcelain and plastic act as insulators because they have high resistivity and strong dielectric strength, so they prevent current flow and provide electrical isolation. They’re used to support and separate energized parts in equipment, such as insulators on power lines and switchgear, keeping conductive components from coming into unwanted contact. They aren’t conductors, shields, or terminals—their role is to keep parts electrically apart and safe rather than to carry current, block fields with a conductive barrier, or serve as connection points.