Energy Conversion and Temperature Measurement

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 the energy transfer. Disconnecting the battery shows a temperature drop, proving the energy conversion process.

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

• Solar 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?

• Battery

• Solar panel

• Light bulb

• Wires

What is the purpose of the thermometer in the experiment?

• To measure light intensity

• To measure heat energy

• To measure electrical energy

• To measure sound energy

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

• 30 degrees

• 20-21 degrees

• 25 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 fluctuates

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

• 25 degrees

• 20 degrees

• 21 degrees

• 30 degrees

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

• By measuring the light intensity

• By disconnecting the battery and observing the temperature drop

• By using a different thermometer

• By changing the light bulb

What is the significance of disconnecting the battery in the experiment?

• To stop the light bulb from working

• To verify the source of heat energy

• To measure the electrical energy

• To change the light bulb

What happens to the temperature when the battery is disconnected?

• It increases

• It remains constant

• It decreases back to 20-21 degrees

• It fluctuates

What conclusion can be drawn from the experiment?

• Mechanical energy is converted to heat energy

• Light energy is converted to electrical energy

• Heat energy is converted to electrical energy

• Electrical energy is converted to light and heat energy