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Chapter 26: Q. 56 (page 740)
What are the charge on and the potential difference across each capacitor in FIGURE ?
The charge on each capacitor is , and the potential difference is respectively.
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A typical cell has a layer of negative charge on the inner surface of the cell wall and a layer of positive charge on the outside surface, thus making the cell wall a capacitor. What is the capacitance of a -diameter cell with a -thick cell wall whose dielectric constant is ? Because the cell鈥檚 diameter is much larger than the wall thickness, it is reasonable to ignore the curvature of the cell and think of it as a parallel-plate capacitor.
The label rubbed off one of the capacitors you are using to build a circuit. To find out its capacitance, you place it in series with a capacitor and connect them to a battery. Using your voltmeter, you measure across the unknown capacitor. What is the unknown capacitor's capacitance?
A capacitor, a capacitor, and a capacitor are connected in parallel. What is their equivalent capacitance?
The flash unit in a camera uses a battery to charge a capacitor. The capacitor is then discharged through a flashlamp. The discharge takes , and the average power dissipated in the flashlamp is . What is the capacitance of the capacitor?
The current that charges a capacitor transfers energy that is stored in the capacitor's electric field. Consider a capacitor, initially uncharged, that is storing energy at a constant rate. What is the capacitor voltage role="math" localid="1648645414866" after charging begins?
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