Question

the electric field strength just above one face of a copper penny is 2000 n/c. what is the surface charge density on this face of the penny?

Answer 1

Since the penny is a conductor , the charge is located on the surface . Assuming a location very near the surface of the conductor , and therefore it can be treated like an infinite surface , the electric field will be : E = σ ϵ 0 Solve for the surface charge density : σ = E ϵ 0 = ( 2000 N/C ) ( 8.85 × 10 − 12 C 2 / N m 2 ) = 1.77 × 10 − 8 C/m 2

Step-by-step explanation: