A parallel plate capacitor is filled with a dielectric having dielectric constant κ=2.1 and dielectric strength Em=278 MV m−1.

Sunday, 26 August 2018

12:49 AM

Machine generated alternative text: Question: part 1) A parallel plate capacitor is tilled witn a dielectric having dielectric constant R can support a potential ditterence of 95 V? part 2) 2.1 and dielectric strength Em 278 MV m . What is the minimum theoretical separation between the plates it At a voltage of 95 V, what capacitance would be required to store 1.0 kilowatt-hour ot energy? farads part 3) At a voltage of 95 V, what minimum volume of dielectric would be required to store 1.0 kilowatt-nour ot energy? volume Check

 

Machine generated alternative text: Feedback tor Part 1) The field must be no greater than Em, so — = Em, so d Marks for this submissiom 0.00/0.33. This submission attracted a penalty of 0.11 Feedback tor Part 2) U = Acv2soc=2 2x 1000 watts x3600 s (95 Marks for this submissiom 0.00/0.33. This submission attracted a penalty of 0.11 Feedback tor Part 3) U = and C and the minimum V = Emd. So (Emd)2 volume = Ad 2x3.6MJ Note that the final answer does not depend on V : a big V would require a larger d but could nave a correspondingly smaller A. Note also that we have not included the volume ot the plates and connections. Marks for this submissiom 0.00/0.33. This submission attracted a penalty of 0.11 A correct answer is 340, which can be typed in as follows: 348 A correct answer is 800, which can be typed in as follows: sea A correct answer is 5, which can be typed in as follows:

 

 

Created with Microsoft OneNote 2016.