A Van De Graaff Generator Has a Spherical Dome of Radius

question 14

Multiple Choice

A Van de Graaff generator has a spherical dome of radius 20 cm.Operating in dry air,where "atmospheric breakdown" is at E_max = 3.0 x 10⁶ N/C,what is the maximum charge that can be held on the dome? (k_e = 8.99 x 10⁹ N*m²/C²)

• A)2.7 x 10^-5 C
• B)1.3 x 10^-5 C
• C)2.6 x 10^-6 C
• D)1.2 x 10^-6 C

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