A fully charged parallel plate capacitor has a dielectric between its plates. If the dielectric material is removed, the potential difference across the plates increases by 35 %. What is the dielectric constant of the dielectric? Assume that the capacitor is not connected to a source potential after being fully charged.
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A fully charged parallel plate capacitor has a dielectric between its plates. If the dielectric material is removed, the potential difference across the plates increases by 35 %. What is the dielectric constant of the dielectric? Assume that the capacitor is not connected to a source potential after being fully charged.
The dielectric constant is,
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- You then fill the capacitor with a dielectric material of dielectric constant κκ while the capacitor remains connected to the same potential difference. What is the new charge on the plates? What is the new energy stored by the capacitor?A parallel-plate capacitor is made of two square plates 25 cm on a side and 1.5 mm apart. The capacitor is connected to a 70-V battery. Hint a. What is the energy stored in the capacitor? Energy stored in the capacitor is b. With the battery still connected, the plates are pulled apart to a separation of 3 mm. What is the energy stored in the capacitor now? Energy now stored in the capacitor is HJ. µJ. c. This time, starting from situation in (a), with the batteries disconnected (but capacitors still charged), the plates are pulled apart to a separation of 3 mm. What is the energy stored in the capacitor now? Energy now stored in the capacitor is d. Comparing your results in (b) and (c) above, it makes sense that the energy stored in the capacitor increases in (c), because the work done in separating the plates is stored as the electrostatic potential energy. In (b), why does the energy decrease even though work is done in separating the plates? HJ. O A negative work is done in…A charged particle with initial speed v, enters a region of uniform electric field set up by the plates of a parallel plate capacitor. Upon entering the region, the particle speeds up and it is attracted to the higher potential plate. What is the sign of the charge? 1/1 O Cannot be determined Positive Negative Neutral
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