TS EAMCET · Physics · Units and Dimensions
Which of the following is the unit of mobility of a electron in a conductor?
- A \(\mathrm{kg}^{-1} \mathrm{~s}^2 \mathrm{~A}^{-1}\)
- B \(\mathrm{kg}^{-1} \mathrm{~s}^2 \mathrm{~A}\)
- C \(\mathrm{kg}^{-1} \mathrm{~ms}^2 \mathrm{~A}^{-1}\)
- D \(\mathrm{kg} \mathrm{ms}^{-1} \mathrm{~A}^{-1}\)
Answer & Solution
Correct Answer
(B) \(\mathrm{kg}^{-1} \mathrm{~s}^2 \mathrm{~A}\)
Step-by-step Solution
Detailed explanation
Mobility is given as \(\mu=\frac{e \tau}{\mathrm{m}}\) So, unit of \(\mu\) is \(\frac{\text { coulomb }-\mathrm{sec}}{\mathrm{kg}}\) i.e. \(\mathrm{kg}^{-1} \mathrm{~s}^2 \mathrm{~A}\)
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