THE A capacitor has two square plates that are d=1.1 mm apart. Each plate is L x
ID: 1574367 • Letter: T
Question
THE A capacitor has two square plates that are d=1.1 mm apart. Each plate is L x where L-52 cm. The capacitor is initially uncharged. (a) Calculate the work required to move q-7.2 jiC of charge from one plate to the other. (b) Calculate the work required to move an additional 72 C of charge from one plate to the other PAPER SOLUTION INTERPRET DEVELOP In your answers below, type EO to represent o (a) Derive an algebraic expression for the work to move the first (b) Derive an algebraic expression for the work to move the second q EVALUATEExplanation / Answer
a) Workdone, W1 = energy stored in capacitor
= q^2/(2*C)
= q^2/(2*A*epsilon/d)
= q^2*d/(2*L^2*epsilon)
b) Workdone, W2 = change in energy stored in capacitor
= Ef - Ei
= (2*q)^2*d/(2*L^2*epsilon) - q^2*d/(2*L^2*epsilon)
= 3*q^2*d/(2*L^2*epsilon)
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