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 2 years ago
two 10cm diameter metal disks separated by a 0.63mm thick piece of pyrex glass are charged to a potential difference of 1000V. dialectric constant for pyrex is K=4.7. what is the surface charge density on the disks?
 2 years ago
two 10cm diameter metal disks separated by a 0.63mm thick piece of pyrex glass are charged to a potential difference of 1000V. dialectric constant for pyrex is K=4.7. what is the surface charge density on the disks?

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elica85
 2 years ago
Best ResponseYou've already chosen the best response.0i found that parallelplate capacitor has \[C=(\epsilon _{0}A)/d\] using that, i get C=(8.85*10^12*pi*.05^2)/.00063=1.1*10^10F then Q=CV=1.1*10^10*1000=1.1*10^7C then \[\eta=Q/A\] so (1.1*10^7)/(pi*.05^2)=1.4*10^5C/m^2

elica85
 2 years ago
Best ResponseYou've already chosen the best response.0what i did just doesn't seem right since there should be A LOT of charge per square meter...right?
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