Two Parallel Conductors Each of 0

Multiple Choice

Two parallel conductors each of 0.34 m length,separated by 6.4 × 10−³ m and carrying 4.8 A in opposite directions,will experience what type and magnitude of mutual force? (magnetic permeability in empty space µ₀ = 4π × 10−⁷ T⋅m/A)

A) attractive,2.1E-3 N
B) repulsive,2.1E-3 N
C) attractive,2.4E-4 N
D) repulsive,2.4E-4 N
E) zero