1. The problem statement, all variables and given/known data Suppose two metal plates are separated by 1.00 cm. These plates are wide: at least 0.5 m square. We hook wires from a battery to each plate, so that there is a potential of 500 volts between them. 2. Relevant equations (A) Find the electric ﬁeld between the plates, in the middle where the ﬁeld is quite uniform. (B) Suppose we introduce a small object which has +2.0 nC (nanocoulombs) of charge on it, placing it between the plates, near the middle where you just found the electric ﬁeld. Determine the electric force on this object. 3. The attempt at a solution (A) I'm guessing I use the formula VAB = Ed. Step 1 1.00 cm converted to meters = 0.01 Step 2 VAB = Ed. 500=(E)(0.01). E = 5.0 x 104 V/m. Does the width of the plate have any influence though? (B) I can't figure out how to do part (B) I'm thinking I use the formula F = qE. Step 1 +2.0 nanoCoulomb's converted to Coulombs = +2.0 x 10-9 C Step 2 F = qE. F =(2.0 x 10-9 C)(5.0 x 104 V/m) F = 1.0 x 10-4 N Again does width of the plate have any influence?