일반물리학 2 — Maxwell's Equations; Magnetism of Matter: Problem 53

53 In Fig. 32-31, a parallel-plate capacitor has square plates of edge length $L = 1.0\text{ m}$. A current of $3.0\text{ A}$ charges the capacitor, producing a uniform electric field $\vec{E}$ between the plates, with $\vec{E}$ perpendicular to the plates. (a) What is the displacement current $i_d$ through the region between the plates? (b) What is $dE/dt$ in this region? (c) What is the displacement current encircled by the square dashed path of edge length $d = 0.50\text{ m}$? (d) What is the value of $\oint \vec{B} \cdot d\vec{s}$ around this square dashed path?