Find the Force

Electricity and Magnetism Level 5

Find the force required to hold two hemispheres of radius 1 E 0 \frac { 1 }{ \sqrt { { E }_{ 0 } } } and charge Q/2 = 4. If this force is expressed as an infinite product what is the first term? Hint: Apply Gauss' Law with a cylindrical surface and use the polar axis.

2 2 \frac { \sqrt { 2 } }{ 2 } 3 3 2 \frac{3}{2} 3 2 \frac{\sqrt{3} }{2}

Tomas Smith by Tomas Smith , 30, Canada

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