The force on the current-carrying conductor in a magnetic field depends upon:(a) the flux density of the field(b) The strength of the current(c) The length of the conductor perpendicular to the magnetic field(d) The directions of the field and the current

• A. (a), (c) and (d) only
• B. (a), (b)and (c) only
• C. (a), (b) and (d) only
• D. (a), (b), (c) and (d)