Oct 19, 2016 10:48
7 yrs ago
3 viewers *
English term

maximum charge density

English Tech/Engineering Materials (Plastics, Ceramics, etc.) static electricity, ignition, testing
In fact my doubts concern the whole following sentence, which is uninterpretable to me.

If the total quantity of electrostatic charge (3.6 microcoulombs) created by the movement of the powder was induced on the chime this would have exceeded the maximum charge density any surface can hold in air.

The article is here

http://www.ongmarketplace.com/dust-cloud-ignition-caused-by-...

I hope this is acceptable to post a question like this, even though it is a matter of construction rather than just elucidation of a single term.

Responses

+1
29 mins
Selected

maximim electric charge per unit volume of space

https://en.wikipedia.org/wiki/Charge_density
In electromagnetism, charge density is a measure of electric charge per unit volume of space, in one, two or three dimensions. More specifically: the linear, surface, or volume charge density is the amount of electric charge per unit length, surface area, or volume, respectively. The respective SI units are C·m−1, C·m−2 or C·m−3.[1]

Regarding the sentence, I think some parts are more obvious than others. Which part are your having trouble with?


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Note added at 44 mins (2016-10-19 11:32:50 GMT)
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The verbs are all necessary and correctly conjugated, but perhaps the sentence is a bit longwinded and ambiguous. I hope this makes it clearer:
“If the total quantity… [that was created by the movement of the powder] was induced on the chime, this would have exceeded the maximum charge density that any surface can hold in air.”


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Note added at 46 mins (2016-10-19 11:34:31 GMT)
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Yes, the comma and adding the implicit 'that' in those 2 places.
Note from asker:
I find the 3 verbs confusing 1 was induced 2 would have exceeded 3 can hold To me there are too many verbs here.
I have just found that adding a comma helps. If the total quantity of electrostatic charge (3.6 microcoulombs) created by the movement of the powder was induced on the chime, this would have exceeded the maximum charge density any surface can hold in air. The comma after 'the chime' makes it a difference, doesn't it?
Peer comment(s):

neutral Didier Fourcot : per unit of SURFACE AREA: " The maximum charge density of a surface in air is equivalent to 27 micro-coulombs per square metre" (2 dimensions per your WP reference)
42 mins
agree acetran
1 day 19 hrs
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