Two tiny conducting spheres are identical and carry charges of -20.0 µC and +56.

Question

Two tiny conducting spheres are identical and carry charges of -20.0 µC and +56.0 µC. They are separated by a distance of 2.20 cm.
(a) What is the magnitude of the force that each sphere experiences, and is the force attractive or repulsive?
1 Check the syntax of your response. N and the force is 2.

(b) The spheres are brought into contact and then separated to a distance of 2.20 cm. Determine the magnitude of the force that each sphere now experiences, and state whether the force is attractive or repulsive.
3 Check the syntax of your response. N and the force is

Explanation / Answer

a) Since spheres are tiny we can assume they are point charges. Since both hav enegative charge they will repel with a force F F= k q1q2/R2 F= 8.9x109 x 20x10-6 x 56x10-6/(2.20 x 10-2)2 F=20,600 N b) when they touch they will share the charge equally q=q1=q2= (20x10-6 x 56x10-6)/2 = 38x10-6 C now F= k q1q2/R2 =F= k q2/R2 F= 8.9x109 (38x10-6)2/(2.20 x 10-2)2 F=26,600 N

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