8. - You buy a 75w electric bulb in Europe, where electricity is 240v. If you use that electric bulb in U.S.A. where the voltage is 120v. How will the brightness of the bulb change with respect to Europe?
Because in this case, it is not necessary to perform an operation to obtain a specific data. We will take the formual to compare the brightness of the bulb in both places. For this we will follow the following formula: