Made from materials that allow the electrical current to travel through it; examples include copper strand wire.

Made from materials that allow the electrical current to travel through it; examples include copper strand wire.

• A. Insulators
• B. Semiconductors
• C. Conductors
• D. Resistors

Answer: (C)

Electric current flows easily through materials that have many free charge carriers; such materials are called conductors. In metals like copper, atoms form a lattice with loosely bound outer electrons that become free to move when a voltage is applied. This makes copper a prime conductor, so copper strand wire is used to carry current with minimal resistance. Insulators, by contrast, resist current flow and have high resistance, so they don’t let electricity pass readily. Semiconductors conduct but only under certain conditions and with controlled doping or temperature changes. Resistors are components designed to limit or control current, often made from materials with a specific resistivity to achieve a desired resistance. Because the description points to a material that inherently allows current to travel, the correct choice is conductors.

Electric current flows easily through materials that have many free charge carriers; such materials are called conductors. In metals like copper, atoms form a lattice with loosely bound outer electrons that become free to move when a voltage is applied. This makes copper a prime conductor, so copper strand wire is used to carry current with minimal resistance.

Insulators, by contrast, resist current flow and have high resistance, so they don’t let electricity pass readily. Semiconductors conduct but only under certain conditions and with controlled doping or temperature changes. Resistors are components designed to limit or control current, often made from materials with a specific resistivity to achieve a desired resistance. Because the description points to a material that inherently allows current to travel, the correct choice is conductors.