Question 1:

Who is credited with inventing the first practical incandescent light bulb?

Explanation: The first practical incandescent light bulb was invented by Thomas Edison.

Question 2:

What material was used as the filament in Thomas Edison's first successful light bulb?

Explanation: Thomas Edison's first successful light bulb used a filament made of carbonized bamboo.

Question 3:

When was the first practical incandescent light bulb invented?

Explanation: The first practical incandescent light bulb was invented by Thomas Edison in 1879.

Question 4:

Which of the following gases is commonly used to fill incandescent light bulbs?

Explanation: Incandescent light bulbs are commonly filled with inert gases like argon or nitrogen.

Question 5:

What was the major drawback of incandescent light bulbs in terms of energy efficiency?

Explanation: The major drawback of incandescent light bulbs was their low energy efficiency due to the excessive heat they produced.