AC is when the electrons flow in two directions, from the positive to the negative terminal and from the negative to the positive terminal, 'alternating' between the two directions. A lot of people think of electron flow as electrons moving along a wire freely like cars go down a highway.
To check the status of protected mode, choose File > Properties > Advanced > Protected Mode. Protected mode is enabled by default. To specify the settings, do the following: Choose Edit > Preferences. In the Categories list on the left, select Security (Enhanced). In the Sandbox Protections section, select or deselect Enable Protected Mode At Startup. Enable Create Protected Mode Log File to record events. The changes take effect the next time you start the application.
As you migrate to Excel 2010 or 2013, you may sometimes encounter spreadsheets that open in a special Protected View mode. You can view-but not edit-such documents until you grant permission within an onscreen prompt. I'll explain Protected View and how you can adjust this security measure to suit your needs.igure 3: You can also access the Protected View settings through Excel's Options dialog box. Thirty-two-bit versions of Excel 2010 offer an additional check box labeled Enable Data Execution Prevention Mode. This option was removed from Excel 2013 and does not appear in 64-bit versions of Excel 2010.