A conductor 4 m long lies along x-axis with a current of 10.0 A in the $${\hat i}$$ direction. The force on this conductor due to a magnetic field $$B = 0.05\hat kT$$   is

A. $$2.0\hat jN$$

B. $$0.2\hat jN$$

C. $$ - 0.2\hat jN$$

D. $$ - 2.0\hat jN$$

Answer: Option D