All Problems

Electric Capacitance, Energy of an Electric Field

Problem 3.127

Determine the interaction energy of the point charges located at the corners of a square with the side aa in the circuits shown in Fig. 3.29.3.29 .

Reveal Answer
3.127. (a) W=(2+4)q2/4πε0aW=(\sqrt{2}+4) q^{2} / 4 \pi \varepsilon_{0} a (b) W=(2−4)q2/4πε0aW=(\sqrt{2}-4) q^{2} / 4 \pi \varepsilon_{0} a (c) W=−2q2/4πε0aW=-\sqrt{2} q^{2 / 4} \pi \varepsilon_{0} a
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