TP 22.28

Given: q = 7.50^o

I = 6.20 A

F/l = 0.033 N

Find: (a) B - ?

F = I l B sin (q)

F/l = I B sin (q)

B = (F/l)/(I sin (q))

B = (0.033N)/((6.20 A) sin (7.50^o)) = 0.0408 T

Find: (b) : q - ? If F/l = 0.015 N

F/l = I B sin (q)

sin (q) = (F/l)/ (I B) = (0.015 N)/((6.20 A)(0.0408 T)) = 0.0593

q = 3.40^o