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- A solid conducting sphere with a 11 cm radius sits inside a hollow conducting sphere witha 13 cm inside radius and 15 cm outside radius. The gap between the conductors is filled with distilled water. If the two conductors are connected across a 12 V battery, then what is the charge on the conductors of the configuration? The dielectric constant for distilled water is 80.An air-filled parallel-plate capacitor with capacitance Co stores charge Qon plates separated by distance d. The potential dif- ference across the plates is AV, and the energy stored is PEc,o- If the capacitor is disconnected from its voltage source and the space between the plates is then filled with a dielectric of 2.00, evaluate the ratios (a) Cnew/Co, (b) AVnew/ constant K = AVo, and (c) PEc new /PECO.The voltage across a membrane forming a cell wall is 77.7 mV and the membrane is 9.02 nm thick. What is the electric field strength? (The value is surprisingly large, but correct.) You may assume a uniform E-field.
- Imagine that two parallel plates are charged to achieve a voltage difference Vo between the plates. They have area A and spacing d. The plates are then electrically isolated so that no charge can be added or taken away. A good conductor of thickness d/2 is placed in between the two plates, as shown. What then is the capacitance of this new configuration? Is it different from the original capacitance?A charge ±Q is placed on the plates of a capacitor, which is then disconnected from the outside world. The separation between the plates is changed, and it is found that the voltage across the plates decreases. (a) Have the plates been moved closer together or farther apart? O closer together O farther apart (b) If the new voltage is smaller than the original voltage by a factor of six, what is the ratio of the new plate spacing to the original spacing?copacitor has aircular parallel plaks that have a radius 3.00 and are seperated by hillum. The space between the plates is filled with polycarbonate (k = 2.8, E-30×10³) Find the permittivity of polycarbonate. Find the maximum permissible voltage across the capacitor to avoid dielectric break down, © When the voltage equals the value found in part (6), find the surface charge density on each plate (6), find the induce surface charge density on the surface of the surface of the dielectric (5), and find the ret surface change density (that).
- Does the potential at point P have a direction, and if so what is the direction?A capacitor is composed of 2 plates separated by a sheet öf insulatih and of relative permittivity 4. The distance between the plates is increased to allow the insertion of a second sheet of 5mm thick and of relative permittivity &,. If the equivalent capacitance is one third of the original capacitance, find the value of ɛ,.Derive the capacitance for a spherical capacitor. (two conducting concentric spheres of radius R1and R2)