Who invented the first practical electric bulb?

• Nikola Tesla

• Thomas Edison

• Benjamin Franklin

• Alexander Graham Bell

What year was the electric bulb invented?

• 1765

• 1901

• 1885

• 1879

Name one type of electric bulb that is energy-efficient.

• Halogen bulb

• Incandescent bulb

• Fluorescent bulb

• LED bulb

What is the main difference between incandescent and LED bulbs?

• Incandescent bulbs are more energy-efficient than LED bulbs.

• Incandescent bulbs last longer than LED bulbs.

• Incandescent bulbs use a filament to produce light, whereas LED bulbs use a semiconductor.

• LED bulbs produce light using gas instead of a semiconductor.

How does an electric bulb produce light?

• Through the process of nuclear fusion.

• By converting sound waves into light energy.

• An electric bulb produces light by heating a filament until it glows.

• By using a chemical reaction to emit light.

What is the role of the filament in an incandescent bulb?

• The filament produces light by heating up and glowing when electricity passes through it.

• The filament is used to store electrical energy.

• The filament acts as a cooling agent to reduce heat.

• The filament absorbs light from the surroundings.

What gas is often used in fluorescent bulbs?

• Mercury vapor

• Carbon dioxide

• Nitrogen gas

• Argon gas

What are the main components of an electric bulb?

• Plastic casing, resistor, solar panel, mercury

• Glass cover, copper wire, battery, air

• Glass bulb, filament (or LED chip), base, inert gas or vacuum.

• Ceramic shell, neon light, switch, water

Why is it important to use the correct wattage for a bulb?

• Using any wattage will not affect the bulb's brightness.

• The wattage of a bulb is irrelevant to its lifespan.

• It is important to use the correct wattage for a bulb to ensure safety and optimal performance.

• Higher wattage always results in better energy efficiency.

What safety precaution should you take when changing a bulb?

• Turn off the power before changing the bulb.

• Use a wet cloth to handle the bulb.

• Change the bulb while the power is on.

• Replace the bulb without any tools.