The area vector for a flat surface PLEASE select one answer

The area vector for a flat surface: PLEASE select one answer and explain why.

a. is parallel to the surface and has a magnitude equal to the length of a side of the surface.

b. is perpendicular to the surface and has a magnitude equal to the length of a side of the surface.

c. is parallel to the surface and has a magnitude equal to the area of the surface.

d. is perpendicular to the surface and has a magnitude equal to the area of the surface.

e. none of the above

Solution

Area vector is a vector whose magnitude equal to it\'s area and it\'s directed prependicular to surface.

OPTION (D) must be correct.