Autosave . "FF 6' E Home Insert Draw Page 'i of 12 Times New... Bil 1534 Words a; : Design Layout References [13x English (Unlted Stat Mailings E1 1402 Capacitor and Dielectrics Lab Review View '15" Tell me AaEchDdEe AaBchDdl No Spacing Heading 1 Name; Capacitors and Dielectrics: mLah Introduction: Capacitor is an electrical element that stores charge and energy. Charge Q that is stored in a capacitor is proportional to the applied voltage V. Capacitance (C) is the constant of proportionality. Q C: DVC Capacitance of a capacitor is a measure of charge capacity and it only depends on size, shape and spacing of electrodes. A capacitor is shown below in the figure. Plates have area A Two parallel and ldentloal plates of any shape with an area A are separated by a distance of d. By charging one of the plates with positive and the other plate with an equal amount of negative charge, a capacitor stores energy. Capacitance of the capacitor is given by where Du: 8.35 x 1F\" F/mijs a constant ' AiBchDdEe Heading 2 Aa BchDdEe Heading 3 AaBb( ) l: Title Styles Pane iv' Share Dictate D Comments AutoSave OFF 1402 Capacitor and Dielectrics Lab - Saved Home Insert Draw Design Layout References Mailings Review View Tell me Share Comments Times New... 12 AA Aa v AL AaBbCcDdEe AaBbCcDdEe AaBbCcDdl AaBbCcDdEe AaBbCcDdEe AaBb( Paste BI Uv ab X2 v LV Av Normal No Spacing Heading Heading 2 Heading 3 Title tyles Dictate Sensitivity Pane When insulating materials (dielectrics) are inserted between the plates, they get polarized under electric field. Dielectrics can be used to increase the capacitance of a capacitor. When a dielectric is inserted, the capacitance of the capacitor is given by _KEOA C = - d where O is the dielectric constant of the insulating material. Every material has its own constant. For air, D =1 and for common dielectric materials like Teflon, paper, glass etc 0 >1 so that capacitance is larger with them. Procedure: On your browser, go to https://phet.colorado.edu/ Click on "Simulations" > "Physics" -> "Electricity, Magnets & Circuits" > "Capacitor Lab" -> Download or ru When you start the simulation, you will see a page like this: Capacitor Lab (2 Introduction Dielectric Multiple Capacitors PET View Plate Charges Electric Field Line Meters - 1 Plate charge Disconnect Battery Stored Energy voltmeter Electric Field Detector Separation Reset All Plate Area TISV 2 Page 2 of 12 1534 words English (United States) Focus E + 100%AutoSave . \"FF {5' Q Q: : E1 1402 Capacitor and Dielectrics Lab Home Insert Draw Design Layout References Mailings Review View '1; Tell me a Share D Comments TimesNew... v A A AaEchDdEe AaBbCCDdI AiBbCCDdEe Aa BchDdEe Aa B b ( ) No Spacing Heading1 Heading 2 Heading 3 Title Styles Dictate Pa ne Experiment 1: Charging a Capacitor m t Disconnect the battery by clicking on the control . Uncheck \"Plate Charges\" . Check voltmeter. 1 Z 3 4. Attach the red probe to the top plate and the black Due to the bottom plate, 5. Slide the slide an the batter all the way up to 15V. 6t Connect the battery. Vou should be seeing a picture like the one below: Disconnect Bakery Question 1: Check the electric eld lines box. In the space below, draw the capacitor and draw the electric eld lines inside It Which plate ls positive and which plate is negative? Page 3 of 12 i534 words English (United States) AutoSave . \"FF {5' Q Q: : E1 1402 Capacitor and Dielectrics Lab Home Insert Draw Design Layout References Mailings Review View .5 Tell me 6 Share D Comments Times New\" V A A ~ Aaabcmdse AaBchDdl AaBchDdEe AaBchDdEe AaBb( ) No Spacing Heading1 Heading 2 Heading 3 Title Styles Dictate Pa ne Experiment 2: Changing capacitor area m (hanging capacitor area whlle battery is connected Procedure: 1' Check all the meters and "Plate Charges" on. like the picture below. Your battery has the slider all the way up, Do not forget to connect the voltage probes to the plates. 2t Slowly increase the area ofthe plates by dragging the little double arrow away from the plates and observe the changes. 3t Fill in the table below for two different areas. Page A ONE i534 words English (United States) AutoSave OFF 1402 Capacitor and Dielectrics Lab - Saved Home Insert Draw Design Layout References Mailings Review View Tell me Share Comments Times New... 12 AA Aa v AL AaBbCcDdEe AaBbCcDdEe AaBb CcDdl AaBbCcDdEe AaBbCcDdEe AaBb( Paste Av LAV Normal No Spacing Heading Heading 2 Heading 3 Title tyles BI Uv ab Dictate Sensitivity X2 Pane + C (mm?) (mm) (F) (V) (C) (V/m) () 100 10 400 10 Question 1: After you fill the table, calculate capacitance (C), charge (Q), electric field (E) and stored energy (U) for the case where A = 400 mm and d = 10 mm to verify simulation results. Do not forget to show your formulas and units. Question 2: Explain which of the following decreases, increases or stays the same when we increase the area while battery is connected. Change (increase/decrease/stay the same) Capacitance Charge on plates Voltage across plates Net electric field between plates Energy stored in the capacitor izi 5 Page 5 of 12 1534 words English (United States) FocusAutoSave . \"FF {5' Q Q: : El 1402 Capacitor and Dielectrics Lab Home Insert Draw Design Layout References Mailings Review View F" Tell me lv' Share D Comments Times New. V AaEchDdEe AaBchDdl AaBchDdEe AaBchDdEe AaBb( ) L .j B I L v - ' i No Spacing Heading1 Heading 2 Heading 3 Title Styles Dictate 7 *' Pa ne Question 3: When the capacitor Is connected to a battery and you halved Its area, which variables will also be halved? Explain and prove with equations 2e Changing capacitor area whlle battery is dis-connected Procedure: . Click on "reset all\" (conrm yes when asked). t Slide the battery slider all the way up. t Disconnect the battery . Check all the meters and \"Plate Charges\" on. Do not forget to connect the voltage probes to the plates, . Slowly increase the area ofthe plates by dragging the little double arrow away from the plates and observe the changes. t Fill in the table below for two different areas A '1 |V| IQI IEI U lmmzl (nun) (V) (C) (V/m) (J) 100 l 10 400 10 Page 6 of 12 l53d words English (United Stat AutoSave . "FF {5' Q Q: : E1 1402 Capacitor and Dielectrics Lab Home Insert Draw Design Layout References Mailings Review View .5 Tell me 6 Share D Comments Times New\" V ' ~ AaEchDdEe AaBchDdl AaBchDdEe AaBchDdEe AaBb( ) L .j B i L v - ' ' NoSpacing Heading1 Headingz Headings Title Styles Dictate 7 Pane Question 1: Explain which of the following decreases, increases or stays the same when we increase the area while battery is dis-connected. Change (increase/decrease/stay the same) Capacitance Charge on plates Voltage across plates Net electric field between plates Energy stored in the capacitor Question 2: Show your stored energy calculations for both A = 100 mm2 and A= 400 mm1 areas. Why do you think they are different? Explain and show your prooft Question 3: When a charged capacitor is disconnected from a battery and area of the plates is decreasing; describe what is happening to electric field in the capacitor? Explain why, with using farmulas. Page 7 of 12 1533 words English (United States) AutoSave OFF 1402 Capacitor and Dielectrics Lab - Saved Home Insert Draw Design Layout References Mailings Review View Tell me Share Comments Times New... 12 A A Aa v AL AaBbCcDdEe AaBbCcDdEe AaBb CcDdl AaBbCcDdEe AaBbCcDdEe AaBb( Paste BI Uv ab X2 Av LAV Normal No Spacing Heading Heading 2 Heading 3 Title tyles Dictate Sensitivity Pane Experiment 3: Changing Separation 3A. Changing capacitor separation while battery is connected Procedure: 1. Click on "reset all" (confirm yes when asked). 2. Slide the battery slider all the way up 3. Keep the battery connected. 4. Maximize the area of the plates (400 mm2). 5. Check all the meters and "Plate Charges" on. Do not forget to connect the voltage probes to the plates. 6. Slowly change the separation between the plates by dragging the little double arrow down or up and observe the changes. 7. Fill in the table below for two different separations. C E U (mm 2 ) (mm) (F) (V) (c) (V/m) () 400 10 400 5 Question 1: Explain which of the following decreases, increases or stays the same when we decrease the separation while battery is connected. Page 8 of 12 1534 words English (United States) FocusAutoSave . "FF {5' Q Q: : El 1402 Capacitor and Dielectrics Lab Home Insert Draw Design Layout References Mailings Review View '1; Tell me 6 Share D Comments Times New\" V ' ~ AaEchDdEe AaBchDdl AaBchDdEe AaBchDdEe AaBb( ) L .j B l L v - ' . NoSpacing Heading1 Headingz Headings Title Styles Dictate 7 Pane Change (increase/decrease/stay the same) Capacitance Charge on plates Voltage across plates Net electric field between plates Energy stored in the capacitor Question 2: When a capacitor is connected to a battery and when you increase the separation between the plates, describe what is happening to the electric eld in the capacitor and explain why. 33. Changlng capacitor separation wnlle battery ls dls-oannected Procedure: . Click on \"reset all" (conrm yes when asked). . Slide the battery slider all the way up. . Disconnect the battery. . Maximize the area of the plates (400 mm'). . Check all the meters and "Plate Charges\" on, Do not forget to connect the voltage probes to the plates. . Slowly change the separation between the plates by dragging the little double arrow down or up and observe the changes. . Fill in the table below for two different separations. IVI IQI (V) (C) Page 9 ONE i53d words English (United States) AutoSave . "FF {5' Q Q: : El 1402 Capacitor and Dielectrics Lab Home Insert Draw Design Layout References Mailings Review View .5 Tell me 6 Share D Comments Times New\" V ' ~ AaEchDdEe AaBchDdl AaBchDdEc AaBchDdEe AaBb( ) L .j B l L v - ' l NoSpacing Heading1 Headingz Headings Title Styles Dictate Pane Question 1: Explain which of the following decreases. increases or stays the same when we decrease the separation while battery is discon nectedl Change (increase/decrease/stay the same) Capacitance Charge on plates Voltage across plates Net electric eld between plates Energy stored in the capacitor Experiment 4: Changing Dielectric 4A: Inserting dielectric while battery Is disconnected Procedure: 1. Click on the dielectric tab to switch to another window' \"le\" . Slide the battery slider all the way up. . Disconnect the battery by clicking on the control, . Check all the meters and \"Plate charges" on' Do not forget to connect the voltage probes to the plates. Page 10 of i2 i534 words [1. English (United States) Autosave . \"FF Home Insert Page 11 of 'i2 6'9 Draw Times New... B 'i 53d WOl'dS Design [x a; : Layout References English IUnlted StateS) Mailings El 1402 Capacitor and Dielectrics Lab Review View .5 Tell me AaEchDdEe AaBchDdl No Spacing Heading 1 t Slowly insert the dielectric between the plates by dragging the little double arrow to the left (make sure offset is zero and dielectric is completely placed)l Note that the default dielectric number (El) is 5' Do not change thatl t Fill in the table below. AiBchDdEe Heading 2 A d M (mM') (mm M mu m 1 (am 5 (lled 100 10 completely) Question 1: Explain which of the following decreases, increases or stays the same when we insert a dielectric while battery is dis-connected. Change (increase/decrease/stay the same) Capacitance Charge on plates Voltage across plates Net electric field between plates Energy stored in the capacitor AB: Inserting dielectric while battery ls connected Procedure: a Click on "Reset all\" (confirm yes when asked) . Slide the battery slider all the way up. . Keep the battery connected. . Check all the meters and \"Plate Charges" on, Do not forget to connect the voltage probes to the plates, t Slowly insert the dielectric between the plates by dragging the little double arrow to the left (make sure offset is zero and dielectric is completely placed} Note that the default dielectric number (El) is 5' Do not change thatl Aa BchDdEe Heading 3 AaBb( ) i: Title Styles Pane lv' Share Dictate D Comments