Why does a current-carrying conductor experience no mechanical force when it is placed parallel to a uniform magnetic field?
a) Because the magnetic field strength effectively becomes zero when the conductor is aligned with it, so no force acts
b) Because cos0∘=0 in the expression F=BILcosθ, making the force zero
c) Because the angle between the current and the magnetic field is 0∘, so sin0∘=0 and the force F=BILsinθ vanishes
d) Because the magnetic field cancels the current in the conductor when they are parallel, leaving no current to experience force