Question

Consider an uncharged spherical conductor. If you throw on some electrons, where would they go? Assume the spherical conductor has radius R = 0.14 m. How many electrons can you deposit on the sphere before dielectric breakdown of the air around it occurs? (Hint: determine the strength of the electric field at the surface of the conductor and compare it against the field strength of 3 × 106 V/m above which air becomes a conductor.) If you made the sphere twice as large how would the maximum charge change before dielectric breakdown of air occurs? (Don’t redo the calculation!)

Answer 1

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