Physics

Problem

a. The graph between magnetic force

F

and

\sin\theta

for a straight conductor passes through the origin and a point

P

where

\sin\theta = 0.6

and

F = 0.72\,\text{N}

. The conductor is

0.20\,\text{m}

long and carries a current of

6\,\text{A}

. Determine the magnetic field strength

B

. b. Using the same graph, predict the magnitude of the force on the conductor when

\theta = 120^\circ