Thermoelectric Generators Concepts

The video tutorial explains thermoelectric generators, devices that convert heat into electricity. It demonstrates their operation using hot and cold water, discusses their thermodynamic efficiency, and explores the concept of reversing their operation to function as heat pumps. The video also covers the flow of electrons in the device and highlights safety considerations when using these generators.

What is required for a thermoelectric generator to produce electricity?

• One side must be hot and the other cold

• It must be in a vacuum

• Both sides must be hot

• Both sides must be cold

What is the typical efficiency range of thermoelectric generators?

• 1-2%

• 5-8%

• 10-15%

• 20-25%

How much energy is converted into useful work if 1000 joules of energy flow from the hot reservoir?

• 10 joules

• 500 joules

• 100 joules

• 50 joules

What does a thermoelectric generator look like?

• A cylindrical tube

• A triangular prism

• A flat rectangle

• A round sphere

What happens if electricity is applied to a thermoelectric generator?

• It generates more electricity

• It becomes a heat pump

• It stops working

• It explodes

Why is it important to limit the current flowing into a thermoelectric generator?

• To prevent overheating and potential fire hazards

• To increase efficiency

• To make it work faster

• To reduce noise

In a thermoelectric generator, what are the mobile charge carriers in the p-type semiconductor?

• Electrons

• Neutrons

• Holes

• Protons

Which terminal is connected to the p-type semiconductor in a thermoelectric generator?

• Negative terminal

• Ground terminal

• Neutral terminal

• Positive terminal

What is the direction of conventional current flow in a thermoelectric generator?

• From positive to negative terminal

• From negative to positive terminal

• In a circular motion

• It does not flow

What is the role of the n-type semiconductor in a thermoelectric generator?

• To store energy

• To generate heat

• To block electron flow

• To allow electron flow from hot to cold side