Instead of thinking about one field changing in response to the change of the other, it is more correct to say that. whenever the magnetic field is changing, so is the electric field, and vice versa.The way these fields change is governed by Maxwell's equations.This way, we do not arrive at the confusion OP has.nstead of thinking about one field changing in response to the change of the other, it is more correct to say that. whenever the magnetic field is changing, so is the electric field, and vice versa.
Gross profit = net sales â cost of goods sold. Gross profit percentage = [(net sales â cost of goods sold)/net sales] Ã 100%.
Profit, conversely, can refer to a number of figures. Profit simply means revenue that remains after expenses. While net profit is synonymous with net income, corporate accountants calculate profit at a number of levels. For example, gross profit is revenue less the cost of goods sold, or COGS. Operating profit refers to revenue less COGS and operating expenses.