Question: When dealing with practical devices, we often take the ground (the Earth) to be 0 V. if, instead, we said the ground was 10 V,

When dealing with practical devices, we often take the ground (the Earth) to be 0 V. if, instead, we said the ground was –10 V, how would this affect?
(a) The potential V, and
(b) The electric field E, at other points?

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