Introduction to Nuclear Fusion

The video explores nuclear fusion and fission, focusing on the fusion process where small nuclei combine to form larger ones, releasing energy. It explains the deuterium-tritium fusion reaction, its challenges on Earth due to electrostatic repulsion, and the conditions in the sun that facilitate fusion. The video also discusses prototype fusion reactors on Earth and compares fusion with fission, highlighting the energy potential and waste differences.

What is the primary difference between nuclear fusion and fission?

• Fusion combines small nuclei, while fission splits a large nucleus.

• Fusion splits a nucleus, while fission combines nuclei.

• Fusion produces more radioactive waste than fission.

• Fusion occurs naturally on Earth, while fission does not.

In the sun, which elements primarily undergo fusion?

• Hydrogen and tritium

• Hydrogen and helium

• Carbon and oxygen

• Helium and lithium

What are the products of the deuterium-tritium fusion reaction?

• Oxygen nucleus and a photon

• Helium nucleus and a neutron

• Carbon nucleus and an electron

• Hydrogen nucleus and a proton

Why is it challenging to achieve nuclear fusion on Earth?

• Because fusion reactions do not produce enough energy.

• Because positively charged nuclei repel each other.

• Because fusion reactions produce too much radioactive waste.

• Because fusion requires low temperatures and pressures.

What is the role of high temperature in the sun's fusion process?

• It decreases the pressure in the sun's core.

• It increases the energy and speed of the nuclei.

• It reduces the gravitational field of the sun.

• It slows down the nuclei, making fusion easier.

Which of the following is a benefit of nuclear fusion over fission?

• Fusion produces more radioactive waste.

• Fusion requires less energy to initiate.

• Fusion produces more energy per kilogram of fuel.

• Fusion is easier to control than fission.

Compared to fossil fuels, what is an advantage of nuclear fusion?

• Fusion produces more carbon emissions.

• Fusion is more widely available.

• Fusion is cheaper to produce.

• Fusion produces more energy per kilogram of fuel.