Concept and concept of physical symbols The concept and concept of MV and Ma

Concept and concept of physical symbols The concept and concept of MV and Ma

V is the unit of voltage. It is called volt for short
A is the unit of electric current. It is called ampere for short
M reads "milligram", 1 milligram represents the - 3 power of 10 (for example: 1mg = 0.001g)
Combine MV to make Ma to make ma
1000 Ma = 1 a 1000 MV = 1 V

What does the physical symbol △ х mean

It refers to the change of X. for example, if X represents the position, then "△ х" represents the change of position, that is, how much the position has changed