Often times during volcano eruptions the clouds have large static charge buildups that cause lightning to happen. If a rock is ejected by the volcano and it flies to a height of 1510 m, and the clouds have a charge concentration of +40.0 C at a height of 3000 m and −40.0 C at a height of 1000 m, what is the electric field at the ejected rock

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.