Ions and Candle Flame Behavior

The video explains how candle flames conduct electricity better than air due to the presence of ions, which are charged particles resulting from combustion. The flame acts like a plasma, with positive ions moving towards a negative plate and negative ions towards a positive plate. When plates are charged to 20,000 volts, a larger spark is produced through the flame compared to air. Even the smoke contains ions, causing it to separate into two streams based on charge.

Why do candle flames conduct electricity better than air?

• Because they are hotter than air

• Due to the presence of water vapor

• Due to the presence of ions in the flame

• Because they are brighter than air

What happens to the positive ions in a candle flame?

• They move towards the positive plate

• They evaporate into the air

• They remain stationary

• They move towards the negative plate

What is the voltage applied to the plates in the experiment?

• 10,000 volts

• 15,000 volts

• 20,000 volts

• 25,000 volts

How does the presence of ions in the smoke affect it?

• It makes the smoke heavier

• It separates the smoke into two streams

• It causes the smoke to change color

• It makes the smoke disappear

What is the effect of the candle flame on the spark size?

• It changes the spark color

• It reduces the spark size

• It has no effect on the spark size

• It increases the spark size