A wire along the x -axis carries a current of 3.50 A in the negative direction. Calculate the force (expressed in terms of unit vectors) on a 1.00 cm section of the wire exerted by these magnetic fields
a. B=−(0.65 T)j^
b. B=+(0.56 T)k^
c. B=−(0.31 T)i^
d. B=+(0.33 T)i^−(0.28 T)k^
e. B=+(0.74 T)j^−(0.36 T)k^