A Van De Graaff Generator Has a Spherical Dome of Radius

question 70

Multiple Choice

A Van de Graaff generator has a spherical dome of radius 12 cm. Operating in dry air, where "atmospheric breakdown" is at E_max = 3.0 *10⁶ N/C, what is the maximum charge that can be held on the dome? (k_e = 8.99 *10⁹ N.m²/C²)

• A) 4.8 * 10^-6 C
• B) 1.3 * 10^-5 C
• C) 2.7 * 10^-5 C
• D) 3.3 *10^-6 C

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