You are not at all likely to use the AC ranges, indicated by V~, on your multimeter.
An alternative style of multimeter is the autoranging multimeter:
The central knob has fewer positions and all you need to do is to switch it to the quantity you want to measure. Once switched to V, the meter automatically adjusts its range to give a meaningful reading, and the display includes the unit of measurement, V or mV. This type of meter is more expensive, but obviously much easier to use.
Where are the two meter probes connected? The black lead is always connected into the socket marked COM, short for COMMON. The red lead is connected into the socket labelled VmA. The 10A socket is very rarely used.
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