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%.
Key Differences Between Gross Profit, Operating Profit and Net Profit. 1  Gross Profit is the income left after deducting direct expenses; Operating Profit is the income remained after deducting indirect expenses from gross profit and Net Profit is the net of all expenses, interest, and taxes.