Nuclear fusion
1 mark · EasyWhich statement best describes why nuclear fusion requires very high temperatures and pressures?
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Correct option: The repulsive forces between nuclei must be overcome.
Common mistakes: The nuclei must move slowly enough to combine.; There must be enough gravity for fusion to occur.; Radioactive waste must be produced by fusion.
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Chooses 'The repulsive forces between nuclei must be overcome.'
Worked solution
High temperatures and pressures are needed in fusion so nuclei have enough energy to overcome the electrical repulsion between them.