Question 23M.1.HL.TZ1.16

P and Q are two conductors of the same material connected in series. Q has a diameter twice that of P.

What is $\frac{\mathrm{drift} \mathrm{speed} \mathrm{of} \mathrm{electrons} \mathrm{in} \mathrm{P}}{\mathrm{drift} \mathrm{speed} \mathrm{of} \mathrm{electrons} \mathrm{in} \mathrm{Q}}$?

A.  4

B.  2

C.  $\frac{1}{2}$

D.  $\frac{1}{4}$