A straight conductor of uniform area of cross-section carries a current ' $I$ '. ' $\mathrm{s}$ ' is the specific charge of the electron. The total momentum of all the electrons per unit length of the conductor due to drift velocity is

• Correct answer
  A

  1. $\frac{\mathrm{I}}{\mathrm{S}}$
• B

  Is
• C

  $\sqrt{\mathrm{Is}}$
• D

  $\sqrt{\frac{\mathrm{I}}{\mathrm{S}}}$

Hence, the correct answer is option: 'A'.