In Guericke’s experiment to show the effect of atmospheric pressure, two copper hemispheres were tightly fitted to each other to form a hollow sphere and the air from the sphere was pumped out to create vacuum inside. If the radius of each hemisphere is R and the atmospheric pressure is P, then the minimum force required (when the two hemispheres are pulled apart by the same force) to separate the hemispheres is

Options

A. `2piR^(2)P`
B. `4piR^(2)P`
C. `piR^(2)P`
D. `piR^(2)P//2`

Answer

C