Skip to content

Course home

Sign up

Nuclear and particle physics

EasyMediumHard
123456789101112131415161718192021222324252627282930313233
Question 20

A strange antiquark (sˉ\bar{s}sˉ) is a fundamental particle. Which row of the table correctly describes the properties of a strange antiquark?

Charge (Q)Baryon number (B)Strangeness (S)A+13e−13+1B−13e+13−1C+13e−13−1D+13e+13+1 \begin{array}{|c|c|c|c|} \hline & \text{Charge } (Q) & \text{Baryon number } (B) & \text{Strangeness } (S) \\ \hline \text{A} & +\frac{1}{3}e & -\frac{1}{3} & +1 \\ \hline \text{B} & -\frac{1}{3}e & +\frac{1}{3} & -1 \\ \hline \text{C} & +\frac{1}{3}e & -\frac{1}{3} & -1 \\ \hline \text{D} & +\frac{1}{3}e & +\frac{1}{3} & +1 \\ \hline \end{array} ABCD​Charge (Q)+31​e−31​e+31​e+31​e​Baryon number (B)−31​+31​−31​+31​​Strangeness (S)+1−1−1+1​​
A

Row A

B

Row B

C

Row C

D

Row D

Markscheme

Nuclear and particle physics Questions

  1. A Level
  2. /Physics
  3. /Nuclear and particle physics

90 exam-style questions on OCR A A Level Physics Nuclear and particle physics, covering The nuclear atom, Fundamental particles, Radioactivity, and Nuclear fission and fusion. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank