Physics 2011 JAMB Past Questions - Question 46: under which of the following conditions do gases conduct electricity ?

Correct Answer

D

Explanation

Gases can conduct electricity under specific conditions, such as when they are ionized or when they contain free-moving charged particles. This can occur in the following situations:

1. Ionization: When a gas is subjected to high temperatures or strong electric fields, its atoms or molecules can lose or gain electrons, forming ions. These ions can then carry electric current through the gas.

2. Discharge: Gases can conduct electricity when they undergo a process called electrical discharge. This occurs when a high voltage is applied across a gas, causing it to become ionized and allowing the flow of electric current.

3. Plasma: Plasma is a highly ionized gas that can conduct electricity. It is formed at very high temperatures or when a gas is exposed to a strong electromagnetic field. Examples of plasma include lightning, fluorescent lights, and plasma TVs.

It's important to note that not all gases conduct electricity under normal conditions. Most gases are insulators and do not conduct electricity unless specific conditions are met.