Instruction
1
To translate the amount of current given in amps, Milliamps, simply multiply the number of amperes per thousand. In the form of simple formulas, this rule can be written as follows:
KMA = Ka * 1000,
where:
KMA – number of milliamps,
Ka – the number of amps.
KMA = Ka * 1000,
where:
KMA – number of milliamps,
Ka – the number of amps.
2
Note that a milliamp is one thousandth, not the millionth part of an ampere. To indicate the received amount of milliamps use the following abbreviations:
mA (Russian version), or
mA – international designation.
mA (Russian version), or
mA – international designation.
3
Sometimes there is a spelling "mA" or "ma" - such reductions to apply is undesirable.
Please note that to denote a thousandth of an ampere is used lowercase Russian or Latin (English) letter "em". Unclear or incorrect writing of this letter may lead to confusion. For example, using MA is shown by Megaampere (1000 Amps), and through μА – microamps (a millionth of amperes).
Please note that to denote a thousandth of an ampere is used lowercase Russian or Latin (English) letter "em". Unclear or incorrect writing of this letter may lead to confusion. For example, using MA is shown by Megaampere (1000 Amps), and through μА – microamps (a millionth of amperes).
4
Example.
What is the current strength, expressed in milliamperes, flows through the energy-saving light bulb with power 9W, connected to the household lighting circuit?
Solution.
As the standard voltage in household electrical outlet is 220 V and the current in Amps equals power divided by voltage, number of Amperes, calculated on the standard Windows calculator, is:
Ka = 9/220 = 0,040909090909090909090909090909091
To put the number of Amperes to milliamperes just "move" the decimal point (in this case denoted by a comma) in the three digits to the right. Work:
KMA = 0040,909090909090909090909090909091
This result, although is correct, but for practical calculations is not very convenient. So on the left you should remove the "extra" leading and trailing zeros, and rounding the number. The end result: of 40.91.
Answer: of 40.91 mA.
What is the current strength, expressed in milliamperes, flows through the energy-saving light bulb with power 9W, connected to the household lighting circuit?
Solution.
As the standard voltage in household electrical outlet is 220 V and the current in Amps equals power divided by voltage, number of Amperes, calculated on the standard Windows calculator, is:
Ka = 9/220 = 0,040909090909090909090909090909091
To put the number of Amperes to milliamperes just "move" the decimal point (in this case denoted by a comma) in the three digits to the right. Work:
KMA = 0040,909090909090909090909090909091
This result, although is correct, but for practical calculations is not very convenient. So on the left you should remove the "extra" leading and trailing zeros, and rounding the number. The end result: of 40.91.
Answer: of 40.91 mA.
5
So, if the number of Amps is a decimal, move the decimal point three digits to the right. If the number of Ampere – whole, in order to convert Amperes to milliamperes attribute to this number right three zero.
6
Example.
How many milliamps flows through the heater capacity of 2.2 kW, included in a regular outlet?
Solution.
Put the power in watts and divide it to the AC mains (220 V):
2,2 * 1000 / 220 = 2200 / 220 = 10 (A).
Now just add 10 to three zero to the right: 10 000.
Answer: 10000 mA.
How many milliamps flows through the heater capacity of 2.2 kW, included in a regular outlet?
Solution.
Put the power in watts and divide it to the AC mains (220 V):
2,2 * 1000 / 220 = 2200 / 220 = 10 (A).
Now just add 10 to three zero to the right: 10 000.
Answer: 10000 mA.
