TP 23.3

2nd Edition

 

Given:    q = 32.0o

 

                A = (5.50 cm) x (7.20 cm) = 39.6 cm2 = 39.6 x 10-4 m2

 

                F = 4.80 x 10-5 T-m2

 

Find: B - ?

 

F = B A cos q

 

B = F /( A cos q) = (4.80 x 10-5 T-m2)/((39.6 x 10-4 m2 )(cos 32.0o)) = 0.0143 T

 

 

3rd Edition

Given:    q = 42.0o

 

                A = (5.50 cm) x (6.80 cm) = 37.4 cm2 = 37.4 x 10-4 m2

 

                F = 4.80 x 10-5 T-m2

 

Find: B - ?

 

F = B A cos q

 

B = F /( A cos q) = (4.80 x 10-5 T-m2)/((37.4 x 10-4 m2 )(cos 42.0o)) = 0.0173 T