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.
(computing) An operational mode of x86-compatible CPUs, in which software can use features such as virtual memory, paging, and safe multitasking. protected mode - Computer Definition (1) The native state of an Intel CPU, which provides access to all advanced memory management functions. It was introduced in 1982 with the 16-bit 286 chip, which was the first x86 chip to break the 1MB barrier of the original 8086/8088 architecture.