What is the ratio of the current sensitivity for two moving coil meters, M1 and M2, with the following specifications: M1: R1 = 10 Ω, N1 = 30, A1 = 3.6 × 10 –3 m², B1 = 0.25 T M2: R2 = 14 Ω, N2 = 42, A2 = 1.8 × 10 –3 m², B2 = 0.50 T (The spring constants are identical for the two meters).