10. How long, after the switch is closed, will it te charge? R= 1.0 kQ %3D ɛ = 24 V C= 50 uf %3D
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How long, after the switch is closed, will it take the capacitor shown in the drawing to reach 75% of its maximum charge?
One point here I want to make is that How to decide whether the circuit is charging or discharging? The capacitor needs a battery for charging. If we have a battery or voltage source in the circuit, It's a charging capacitor. If there is no battery and only an RC component circuit. THen it's a discharging circuit. So in the question, we have a charging circuit.
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- An air-filled 20-µF capacitor has a charge of 60 μC on its plates. How much energy is stored in this capacitor? Ο 80 μ Ο 70 μ Ο 110 μ Ο 100 μ 90 μSome computer keyboards are based on the idea of capacitance. Each key is mounted on one end of a plunger, the other end being attached to a movable metal plate. The movable plate and the fixed plate form a capacitor. When the key is pressed, the capacitance increases. The change in capacitance is detected, thereby recognizing the key which has been pressed. The separation between the plates is 5.00 mm, but is reduced to 0.150 mm when a key is pressed. The plate area is 9.50 x 105 m?and the capacitor is filled with a material whose dielectric constant is 3.50. Determine the change in capacitance detected by the computer.In the figure below, capacitor 1 (C₁ 29.0 μF) initially has a potential difference of 59.0 V and capacitor 2 (C₂ = 6.00 μF) has none. The switches are then closed simultaneously. C₁ = = C₂ (a) Find the final charge on each capacitor after a long time has passed. Q1 C с (b) Calculate the percentage of the initial stored energy that was lost when the switches were closed. %
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