Physics P2 7.2 Nuclear fusion.

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What is nuclear fusion?
The process of forcing two nuclei close enough together so they form a single larger nucleus.
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What happens when two light nuclei are fused together?
Energy is released when two light nuclei are fused together.
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How can nuclear fusion occur?
Nuclear fusion can be brought about by making two light nuclei collide at very high speed. Fusion is the process by which energy is released in stars.
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There are enormous problems with producing energy from nuclear fusion in reactors, what are these?
Nuclei approaching each other will repel one another due to their positive charge, to overcome this the nuclei must be heated to extremely high temperatures to give them enough energy to overcome the repulsion and fuse.
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What implications does using extremely high temperatures in a reactor to create enough energy to overcome the repulsion of nuclei approaching one another and enable them to fuse have?
Because of the enormously high temperatures involved, the reaction cannot take place in a normal 'container' but has to be contained by a magnetic field.
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By what process is energy released in stars?
Fusion.
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How are nuclei contained in a fusion reactor?
In a magnetic field.
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**IN AN EXAM STUDENTS OFTEN CONFUSE FISSION AND FUSION - DO NOT DO THIS**
**MAKE SURE YOU CAN EXPLAIN THE DIFFERENCE BETWEEN FISSION AND FUSION**
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**LOOK UP DIAGRAM OF A NUCLEAR FUSION REACTION**
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Other cards in this set

Card 2

Front

What happens when two light nuclei are fused together?

Back

Energy is released when two light nuclei are fused together.

Card 3

Front

How can nuclear fusion occur?

Back

Preview of the front of card 3

Card 4

Front

There are enormous problems with producing energy from nuclear fusion in reactors, what are these?

Back

Preview of the front of card 4

Card 5

Front

What implications does using extremely high temperatures in a reactor to create enough energy to overcome the repulsion of nuclei approaching one another and enable them to fuse have?

Back

Preview of the front of card 5
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