the letter used is "I"
For electrical purposes it would be the Abbreviation for Direct Current.
AAnswerThe SI unit for electric current is the ampere, whose symbol (not 'abbreviation') is A. The ampere is defined in terms of the resulting force between two current-carrying conductors, due to their magnetic fields.
That would be the current. The international unit for electrical current is the Ampere. Spelt ampere (with a lower case "a"). The abbreviation is given the upper case "A".
Since this in in the science category, mA is the abbreviation for milliAmperes, i.e. thousandths of an Ampere, the measure of current strength in an electrical circuit.
DC stands for direct current in physics. It is a type of electrical current that flows in one direction consistently throughout a circuit. This is in contrast to alternating current (AC), which changes direction periodically.
The unit of Current is Ampere. Abbreviation of Current is 'I' and that of Ampere is 'A'. The unit of Resistance is ohm. Abbreviation of Resistance is 'R' and that of ohm is the symbol of 'omega' or the symbol of 'ohm'.
A measurement of electricity. Discovered by George Ohm. Ohm being his last name. Not an abbreviation. A measurement of electrical current resistance based per 1 amp of current flow.
The SYMBOL for charge is q, the standard UNIT for charge is coulomb, and the abbreviation for the unit is C
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mA is the abbreviation for milliAmperes. Milli- means one-thousandth, so a milliAmpere is one-thousandth of an Ampere, or Amp for short. Amperes are the standard measure of electrical current. 1mA=.001A
In formulas, the conventional symbol for electric current is I. In actual measurements of current, the standard unit is A (ampere, "amps")