Question 48

Copper provides the least electrical resistance.

Copper is known for its excellent electrical conductivity, which means it offers the least electrical resistance among common materials used in electrical applications.

A) Plastic

Plastic is an insulator and typically has high electrical resistance. It does not conduct electricity well, making it unsuitable for applications requiring low resistance.

B) Oak

Oak, being a type of wood, also has high electrical resistance and is considered a poor conductor of electricity. Its fibrous structure and moisture content contribute to its insulating properties.

C) Rubber

Rubber is another insulating material with high electrical resistance. It is used to cover wires and electrical components to prevent the flow of electricity, confirming its role as a poor conductor.

D) Copper

Copper is widely recognized for its low electrical resistance and is commonly used in electrical wiring and components. Its atomic structure allows for the easy flow of electrons, making it an ideal conductor.

Conclusion

Copper is definitively the correct answer as it possesses the lowest electrical resistance compared to plastic, oak, and rubber. All other options are insulators or have high resistance, making them unsuitable for applications that require efficient electrical conductivity.