Question

9. A current carrying wire is placed in the uniform magnetic field as shown in the figure for problem! The magnetic force on the wire is pointing to the left 19) The magnetic field is pointing a) out of the page b) to the left 20) If the current in the wire decreases by a factor of two, the force a) increases by a b) decreases by a c) decreases by a factor of two d) into the page c) to the right d)) increases by a f of four factor of two factor of four

Answer 1

The magnetic force on a current carrying wire is F = IL times B 19. Using right hand screw rule, we find the direction of magnetic field is into the page (option d) 20. If the current is decreased by a factor of 2 then force also decreases by a factor of 2 (option b)