(Answered) The electric field just above the surface of the charged

Statistics

The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 2.50×10⁵ N/C. What is the surface charge density of the drum, assuming that the drum is a conductor?

2.21×10^-6 C/m^2

(a) The drum of the photocopying machine in the problem above has a length of 38 cm and a diameter of 13 cm. What is the total charge on the drum?

The manufacturer wishes to produce a desktop version of the machine. This requires reducing the size of the drum to a length of 32 cm and a diameter of 6 cm. The electric field at the drum surface must remain unchanged. What must be the charge on this new drum?

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