Temperature Changes in Electrical Experiments

The video tutorial demonstrates the conversion of electrical energy to heat energy using a simple experiment. A battery is connected to a light bulb, and the resulting heat is measured with a thermometer. The temperature increase confirms energy transfer. Disconnecting the battery shows a temperature drop, proving the energy source. The experiment effectively illustrates energy conversion principles.

What type of energy conversion is being demonstrated in the video?

• Mechanical to chemical

• Nuclear to electrical

• Electrical to light and heat

• Chemical to mechanical

Which of the following is NOT a material used in the experiment?

• Solar panel

• Light bulb

• Wires

• Battery

What is the purpose of the thermometer in the experiment?

• To measure electrical energy

• To measure light intensity

• To measure heat energy

• To measure sound energy

What is the initial temperature observed on the thermometer before the light bulb is turned on?

• 25 degrees

• 20-21 degrees

• 30 degrees

• 15 degrees

What happens to the temperature after the light bulb is turned on?

• It decreases

• It remains the same

• It increases to 25 degrees

• It increases to 30 degrees

What is the final temperature observed after the light bulb is turned on for a few minutes?

• 30 degrees

• 25 degrees

• 21 degrees

• 20 degrees

How do we confirm that the heat energy is coming from the light bulb?

• By measuring the battery voltage

• By disconnecting the battery and observing the temperature drop

• By observing the light intensity

• By using a different thermometer

What happens to the temperature when the battery is disconnected?

• It increases

• It remains the same

• It decreases back to 20-21 degrees

• It decreases to 15 degrees

Why is it important to keep everything else the same when disconnecting the battery?

• To ensure the light bulb stays on

• To accurately measure the change in temperature

• To maintain the battery's charge

• To prevent the wires from overheating

What conclusion can be drawn from the experiment?

• Mechanical energy is converted to electrical energy

• Heat energy is converted to light energy

• Electrical energy is converted to heat energy

• Light energy is converted to electrical energy