Exam-style question
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Compare the specific charge of a proton and an electron. Calculate the ratio of their specific charges.
- A.1:1
- B.1:2
- C.2:1
- D.1:3
Model answer
What a good answer should say
- 2:1
Explanation
Why this works
The specific charge of the proton is approximately 9.58 x 10^7 C/kg, while the electron's specific charge is about -1.76 x 10^11 C/kg. The ratio of their specific charges shows that the electron has a much higher charge-to-mass ratio than the proton.
Common mistake
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