The plus/minus (red/black) terminals are for testing Direct Current (DC) power sources.
The black probe is negative.
plus is the positive terminal (cathode) minus is the negative terminal (anode)
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The multitester, also known as the multimeter, seems to have been invented by Donald Macadie, a British Post Office engineer.
Oil Terminal
Carboxyl Group
They are easier to read.
increase the length of the plant
Carboxyl Group
the multitester and its parts
the primary function is to send nerve signals to the various parts of the body
the primary function is to send nerve signals to the various parts of the body