A flat square sheet of thin aluminum foil, 25 cm on a side, carries a uniformly distributed+42 nC charge.What, approximately, is the electric field at the following positions?

(a) 1.0 cm above the center of the sheet Magnitude 1 N/C Direction 2 away from the sheet toward the sheet
(b) 20 m above the center of the sheet Magnitude 3 N/C Direction 4 away from the sheet toward the sheet

Answer rating: 100% (QA)

a The surface charge density is QA 42 x10 9 C 025m 2 672 ... View the full answer