10) One common kind of computer keyboard is 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 (see figure). The movable plate is separated from a fixed plate, the two plates shift forming a capacitor. When the key is pressed, the movable corero option plate is pushed closer to the fixed plate, and the capacitance increases. Electronic Circuitry enables the computer to detect the change in capacitance, thereby recognizing which key has been pressed. The separation between plates when key is Key Plunger pressed is 0.15 x 10³meters. The plate area is 9.50x 10$ m² and Movable metal plate the capacitor is filled with material whose dielectric constant is 3.50. Determine capacitance? Dielectric Fixed metal plate

10) One common kind of computer keyboard is 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 (see figure). The movable plate is separated from a fixed plate, the two plates shift forming a capacitor. When the key is pressed, the movable corero option plate is pushed closer to the fixed plate, and the capacitance increases. Electronic Circuitry enables the computer to detect the change in capacitance, thereby recognizing which key has been pressed. The separation between plates when key is Key Plunger pressed is 0.15 x 10³meters. The plate area is 9.50x 10$ m² and Movable metal plate the capacitor is filled with material whose dielectric constant is 3.50. Determine capacitance? Dielectric Fixed metal plate

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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11. A rectangular parallel plate capacitor (length = L and width= 2L) contains a dielectric with a constant k₁. A square parallel plate capacitor (whose length and width are both L and is filled with a material whose dielectric constant is 4k₁) has the same capacitance as the rectangular one just described. How thick (d) is the square capacitor (ds) compared to the rectangular capacitor (d,)? A. ds = 2d, B. d₂ = d, C. d = 4d, D. ds = 8dr
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A cardiac defibrilator is used to shock a heart that is beating erratically. A capacitor in this device is charged to (6.14x10^3) V and stores (2.1900x10^2) J of energy. What is its capacitance? Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer
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In the figure below, capacitor 1 (C1 = 30.0 µF) initially has a potential difference of 60.0 V and capacitor 2 (C2 = 5.60 µF) has none. The switches are then closed simultaneously. (a) Find the final charge on each capacitor after a long time has passed. Q1 = Q2 = (b) Calculate the percentage of the initial stored energy that was lost when the switches were closed. %
A parallel plate capacitor with a value of 226 pF is made from two square plates with a side length of 40 mm and these two plates are separated by a dielectric material with a thickness of 500 μm. (i) (ii) (iii) (iv) Explain what the dielectric strength of a material is and state its units. Calculate the relative permittivity of the dielectric material. If a voltage of 5 V is applied across the capacitor of part (i), what is the energy stored in it and how much charge is stored on each plate? If the value of the capacitor has to increase by 40%, and the same dielectric material with the same thickness is to be used, calculate the length of the new square plate which has to be used to achieve this increase.
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(a) On a particular day, it takes 9.60×103 J of electric energy to start a truck’s engine. Calculate the capacitance of a capacitor that could store that amount of energy at 12.0 V.(b) What is unreasonable about this result? (c) Which assumptions are responsible?
Could some one explain this thanks