A capacitor with an unspecified charge and a resistor are part of a circuit. Upon discharge, there is a decrease in the potential difference between the capacitor's plates from an initial voltage of 30 V to 3 V in 2 seconds. After 4 seconds, what would be the potential difference between the plates?
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A capacitor with an unspecified charge and a resistor are part of a circuit. Upon discharge, there is a decrease in the potential difference between the capacitor's plates from an initial voltage of 30 V to 3 V in 2 seconds. After 4 seconds, what would be the potential difference between the plates?
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- A parallel-plate capacitor is made of two square plates 40 cm on a side and 1 mm apart. The capacitor is connected to a 40-V battery. What is the energy stored in the capacitor? μJ. With the battery still connected, the plates are pulled apart to a separation of 2 mm. What is the energy stored in the capacitor now? μJ. This time, starting from situation in (a), with the batteries disconnected (but capacitors still charged), the plates are pulled apart to a separation of 2 mm. What is the energy stored in the capacitor now? μJ.You decide to make another capacitor starting with two parallel conducting plates, of area A. Then you place another conductor in the middle which is a thick plate of thickness d. The top of the thick plate is a distance a from the top plate and the bottom of the thick plate is a distance b from the bottom plate. What is the capacitance of your capacitor in terms of A, a, b, d, and ε0? (Hint: an illustration is important)In the figure the battery has a potential difference of V = 10.0 V and the five capacitors each have a capacitance of 14.0 µF. What is the charge on (a) capacitor 1 and (b) capacitor 2?
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