The pressures at `A` and `B` in the atmosphere are, respectively,

Options

A. 1
B. `1//2`
C. `1//4`
D. 2

Explanation

Let `(p_A,j_A,r_A,A_a) and (P_b,ij_B,r_b,A_B)` be specific resistances lengths, radii and areas of wires A and B, respectively.
Resistance of `A=R_A=(p_Aj_A)/A_A=(p_Aj_A)/(pir_A^2)`, Resistance `B=R_B=(pBj_B)/(pir_A^2)=(p_Bj_B)/(pir_B^2)=(2 p_A times j_B)/(pi(2r_A)^2) or I_b/I_a=2/1=2:1`