4. [20 pts) A parallel plate capacitor has surface area of 0.0002 m. There are 1.2x10C charges (each plate has 12 uC but

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4 20 Pts A Parallel Plate Capacitor Has Surface Area Of 0 0002 M There Are 1 2x10c Charges Each Plate Has 12 Uc But 1 (264.37 KiB) Viewed 47 times

4. [20 pts) A parallel plate capacitor has surface area of 0.0002 m. There are 1.2x10C charges (each plate has 12 uC but opposite signs) stored in this capacitor. (a) What is the electric field in the gap of the two plates? (b) Is the E field drawn in figure correct (and why)? (c) If potential V between the two plates is 12 V, what is the gap d between the plates? (d) How much electrical potential energy stored in this capacitor? [80 = 8.85 x 10" (Nm)] 5. [20 pts) A point charge q with negative 10 uC charges is placed in the center of a hollow conducting spherical shell. The radius of the outer radius is 0.02 m. (a) How much is the induced charges on the