How much charge is required to raise an isolated metallic sphere of 1.0-meter radius to a potential of volts? repeat for a sphere of 1.0-cm radius. (b) why use a large sphere in an electrostatic generator, since the same potential can be achieved for a smaller charge with a small sphere?

Explanation:

A) First we will perform the exercise for the 1m radius sphere.

The key is to understand the electric potential of the sphere as well

Understanding that,

Where,

Clearing q of the electric potential equation,

So,

While for the second sphere

B) It is not entirely true, by obtaining a difference of one tenth, it is possible to understand that the larger the diameter, the greater the voltage reached.

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