Exam-style question
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What is the specific charge of an electron if its charge is -1.6 x 10^-19 C and its mass is 9.11 x 10^-31 kg?.
- A.1.76 x 10^11 C/kg
- B.1.76 x 10^10 C/kg
- C.1.76 x 10^12 C/kg
- D.1.76 x 10^9 C/kg
Model answer
What a good answer should say
- 1.76 x 10^11 C/kg
Explanation
Why this works
The specific charge is calculated using the formula specific charge = charge / mass. Substituting the values, we have specific charge = (-1.6 x 10^-19 C) / (9.11 x 10^-31 kg).
This gives us a specific charge of approximately 1.76 x 10^11 C/kg, indicating the charge-to-mass ratio of the electron.
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