Question

You are presented with several long cylinders made of different materials. Which of them are likely to be good conductors of electric current?

1) Wood
2) Plastic
3) Copper
4) Glass

Answer 1

Copper is the only material listed that is a good conductor of electric current due to its high density of free electrons, making it widely used for electrical wiring and appliances.

Step-by-step explanation:

To determine which cylinders would be good conductors of electric current, it's essential to understand that materials with a high density of free electrons, such as many metals, are typically good electrical conductors. Analyzing the materials given:

• Wood and Plastic - These materials are insulators because their molecular structure holds tightly to electrons, making it difficult for electricity to flow through them.
• Copper - Copper is an excellent conductor of electricity due to its high density of free electrons, allowing for ease of electron flow. This is why copper is commonly used in electrical wiring and appliances.
• Glass - Like wood and plastic, glass is also an insulator and is not conducive to electrical current.

Therefore, of the materials presented, Copper is the likely candidate to be a good conductor of electric current.