In a mass spectrometer, a proton (mass mmm, charge +e+e+e) and an alpha particle (mass 4m, charge +2e+2e+2e) are accelerated from rest through the same uniform potential difference VVV.
What is the ratio of the final speed of the proton to the final speed of the alpha particle, vprotonvalpha\displaystyle \frac{v_{\text{proton}}}{v_{\text{alpha}}}valphavproton?
12\frac{1}{2}21
12\frac{1}{\sqrt{2}}21
2\sqrt{2}2
222
48 exam-style questions on AQA A Level Physics Electric fields (A-level only), covering Coulomb's law (A-level only), Electric field strength (A-level only), and Electric potential (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.