Paper 2 · November 2016 · Work, Energy and Power
Which of the following best describes nuclear fusion?
AThe capture of a neutron by a nucleus, forming a heavier isotope of the same element.
BThe splitting of a heavy, unstable nucleus into two lighter nuclei.
CThe emission of an alpha particle from an unstable nucleus.
DThe joining of two light nuclei to form a single, more stable, heavier nucleus.
Explanation
Nuclear fusion is the joining of two unstable (light) nuclei to form a single, more stable, heavier nucleus (this is how the sun produces energy).
Derived from ZIMSEC Physics 5055/2 Paper 2 Theory, November 2016, Q2