The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 3.1 x 105 N/C. What is the surface charge density on the drum, assuming that the drum is a conductor?

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Jarrod RobelLv2

5 Oct 2019

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The imaging drum of a photocopier is positively charged to attractnegatively charged toner particles. Near the surface of the drum,its electric field has magnitude 1.70 x 10^5 N/C. A toner particleis to be attracted to the drum with a force that is 7 times theweight of the particle.

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The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 3.1 x 105 N/C. What is the surface charge density on the drum, assuming that the drum is a conductor?

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