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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

The metal sphere of a small Van de Graaff generator illustrated in Figure 15.23 has a radius of 18 cm. When the electric field at the surface of the sphere reaches 3.0 × 106 V/m, the air breaks down, and the generator discharges. What is the maximum potential the sphere can have before breakdown occurs?

To determine
The maximum potential.

Explanation

Given info: Radius of the sphere (r) is 18 cm The electric field at the surface of the sphere (E) is 3.0×106V/m

Explanation:

Formula to calculate the maximum potential is,

V=Er

Substitute 3.0×106V/m for E and 18 cm for r.

V=(3.0×106V/m)(18cm)=(3

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