A student builds a circuit with a battery and a light bulb. Which materials should the student use to complete the circuit for maximum voltage?

A. connectors made of copper wire surrounded by rubber and with copper clamps
B. connectors made of thin rubber surround by plastic and with plastic clamps
C. connectors made of thin rubber surround by plastic and with copper clamps
D. connectors made of copper wire surrounded by plastic and with plastic clamps

The answer is A. connectors made of copper wire surrounded by rubber and with copper clamps. Copper is a good conductor of electricity and will minimize resistance in the circuit. Rubber is an insulator, which will prevent current from leaking out of the circuit. Using copper clamps will also maintain good conductivity and minimize resistance.