Two large, nonconducting plates are suspended 7.05 cm apart. Plate 1 has an area charge density of +81.3 μC/m², and plate 2 has an area charge density of +37.1 μC/m². Treat each plate as an infinite sheet. How much electrostatic energy UE is stored in 4.54 cm³ of the space in region A? UE What volume V of the space in region B stores an equal amount of energy? V = cm³ Plate 1 Plate 2 J Region A Region B Region C

Two red blood cells each have a mass of 5.05 × 10-¹4 kg and carry a negative charge spread uniformly over their surfaces. The repulsion arising from the excess charge prevents the cells from clumping together. Once cell carries -2.60 pC of charge and the other -2.70 pC, and each cell can be modeled as a sphere 8.20 µm in diameter. What minimum relative speed u would the red blood cells need when very far away from each other to get close enough to just touch? Ignore viscous drag from the surrounding liquid. V = What is the magnitude of the maximum acceleration amax of each cell? Cmax = m/s m/s²

H A very long line of a thin conducting wire produces a radial outward electric field of magnitude 2.24 kN/C at a radial distance of 45.1 cm. How much charge (in nC) is contained in a 5.52-m long length of this wire?

A small plastic ball with a mass of 6.65 10-3 kg and with a charge of +0.149 µC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of each plate is 0.0138 m2. What is the magnitude of the charge on each plate? C

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?

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