Find the maximum net charge that can be placed on a spherical conductor of radius 64 cm before dielectric breakdown of...
Find the maximum net charge that can be placed on a spherical conductor of radius 64 cm before dielectric breakdown of the air occurs. The dielectric strength of the air is 3
Homework Answers
The electric field strength on the surface of
the sphere E = k * Q/ R^2
Q = E * R^2 / k
= 3 * 10^6 * 0.4096 / (8.99 * 10^9)
= 0.1367 * 10-3 C
= 136.7 muC
----------------------------------------------------------
Potential f = E * R
= 3 * 10^6 * 64 * 10-2
= 1920000 V
= 1920 kV
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