Which of the following pair of expressions for drift velocity vd is correct?
A. vd = \(\frac{e \mathrm{E}}{m} \tau\) and vd = \(\frac{I}{n A e}\)
B. vd = \(\frac{e \mathrm{E}}{m} \tau\) and vd = IR
C. vd = \(\frac{-e \mathrm{E}}{m} \tau\) and vd = \(\frac{\mathrm{J}}{n \mathrm{~A} e}\)
D. vd = \([latex]\frac{-e^{2} E}{m}\)[/latex] and vd = \(\frac{\mathrm{I}}{n^{2} \mathrm{~A} e}\)
Answer:A
Which of the following pair of expressions for drift velocity vd is correct?
A. vd = \(\frac{e \mathrm{E}}{m} \tau\) and vd = \(\frac{I}{n A e}\) B. vd = \(\frac{e \mathrm{E}}{m} \tau\) and vd = IR C. vd = \(\frac{-e \mathrm{E}}{m} \tau\) and vd = \(\frac{\mathrm{J}}{n \mathrm{~A} e}\) D. vd = \([latex]\frac{-e^{2} E}{m}\)[/latex] and vd = \(\frac{\mathrm{I}}{n^{2} \mathrm{~A} e}\)