GED Science TestPhysical ScienceEasy
A technician is testing different materials for their ability to allow electric charges to flow through them easily. Which of the following materials would be the most suitable for use as a wire in an electrical circuit?
- ACopper
- BGlass
- CWood
- DRubber
Show answer & explanationAnswer & explanation
Correct answer: A. Copper
Electrical conductors allow charge to flow easily. Copper is a metal known for its excellent electrical conductivity, making it ideal for wires. Glass, rubber, and wood are insulators.
Why the other options are wrong
- B. Glass is an electrical insulator, meaning it resists the flow of electric current.
- C. Wood is an electrical insulator, especially when dry, and does not conduct electricity well.
- D. Rubber is an electrical insulator, commonly used to prevent current flow.
Electrical Conductor
A material that allows electric current to flow through it easily.
- Low electrical resistance
- Often metals like copper, silver, gold
- Used in wires and circuit components
Memory trick: Conductive copper carries current.