A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ??

A square cross-sectional magnet has a pole strength of 1 x 10 Wb and c

1.	A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ??
A.	63.38 N/Wb
B.	633.8 N/Wb
C.	6338 N/Wb
D.	63380 N/Wb
Answer» D. 63380 N/Wb