A parallel-plate capacitor is made of two circular plates of radius a cm. The distance between the plates is d cm, which is much less than the radius. The bottom plate is grounded and the top plate is charged to a potential Vo volts. (a) fields E, D in the space between the plates. If the gap is filled with air. Compute and describe the (b) Find the total charge on each of the plates.: (c) Find the capacitance of the capacitor.

8. The current through a capacitor is given by ic(1) = 0.1-{e00 }. Determine: -1/0.01 (a) The voltage v.(1) across the capacitor. (b) The capacitor energy and power.

5. This problem concerns a junction with a heavily doped n-type region, a thin intrinsic layer, and a moderately doped p-type region as sketched below. Assume the depletion approximation and assume that the width of the depletion region on the P-side is significantly greater than the thickness of the intrinsic layer. N₁-N₁ No=10¹8 D Intrinsic layer N₁ = 10¹⁹ (a) Sketch the electric field vs. position assuming the depletion approximation. (b) Using the sketch in (a), develop an expression for the depletion layer width in the pregion. Your answer should be in terms of Vbi and NĄ. (c) Compare this structure to the same structure without the intrinsic layer. Explain what effect the intrinsic layer will have on the built-in potential, Vbi. (d) Compare this structure to the same structure without the intrinsic layer. Explain what effect the intrinsic layer will have on the maximum electric field in the junction.

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