A 6.8 μF parallel plate capacitor has 160 μC of charge on its plates. If the plates are 2 mm apart, find the electric field strength between the plates.
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- Problems 72, 73, and 74 are grouped. 72. A Figure P26.72 shows a source consisting of two identical parallel disks of radius R. The x axis runs through the center of each disk. Each disk carries an excess charge uniformly distributed on its surface. The disk on the left has a total positive charge Q, and the disk on the right has a total negative charge Q. The distance between the disks is 3R, and point A is 2R from the positively charged disk. Find an expression for the electric potential at point A between the disks on the x axis. Approximate any square roots to three significant figures. FIGURE P26.72 Problems 72, 73, and 74.A circular ring of charge with radius b has total charge q uniformly distributed around it. What is the magnitude of the electric field at the center of the ring? (a) 0 (b) keq/b2 (c) keq2/b2 (d) keq2/b (e) none of those answersA uniform electric field E = 3 000 V/m exists within a certain region. What volume of space contains an energy equal to 1.00 107 J? Express your answer in cubic meters and in liters.
- A thin conducing plate 2.0 m on a side is given a total charge of 10.0C . (a) What is the electric field 1.0 cm above the plate? (b) What is the force on an electron at this point? (c) Repeat these calculations for a point 2.0 cm above the plate. (d) When the electron moves from 1.0 to 2.0 cm above the plate, how much work is done on it by the electric field?Give a plausible argument as to why the electric field outside an infinite charged sheet is constant.A parallel-plate capacitor is formed from two 5.8 cm -diameter electrodes spaced 1.9 mm apart. The electric field strength inside the capacitor is 1.0 ×106N/C. What is the charge (in nC) on each electrode?
- A parallel-plate capacitor is formed from two 1.2 cm-diameter electrodes spaced 2.0 mm apart. The electric field strength inside the capacitor is 1.0×106N/C. What is the magnitude of the charge(in nC) on each electrode?A parallel plate capacitor has a plate area of 21.4 x 10-4 m2 and a plate separation distance of 27 mm. What is the electric field strength between its plates if it stores 49.0 mJ of energy?A parallel-plate capacitor is formed from two 8.0-cm-diameter electrodes spaced 1.8 mm apart. The electric field strength inside the capacitor is 6.0 × 106 N/C. What is the magnitude of the charge (in nC) on each electrode?
- Each plate of an ideal air-filled parallel-plate capacitor has an area of 1,424 mm² and the separation of the plates is 0.076 mm. An electric field of 2.610 x 106 V/m is present between the plates. What is the surface charge density on the plates? (ε = 8.85 × 10-12 C²/N·m²) Give your answer in µC/m².An electron gun has parallel plates separated by 4.00 cm and gives electrons 25.0 keV of energy. What is the electric field strength between the plates?Two parallel plates with a dielectric (k=3.75) in between are separated by a distance of 2.00 mm. What must be the area of each plate if the charge on each plate is 775 nC and the electric field between the plates is 8.84 V/m?