First of all, you need to be clear that the milliampere and ampere are both units of current intensity, current intensity refers to the amount of charge passing through the cross-section of the conductor per unit of time, milliampere can be represented by the symbol mA, and ampere can be represented by the symbol A. Although, these two units are represented by the intensity of the current, but can not be equated completely, because the ampere is 1,000 times more than the mA, so milliampere converted to ampere can be be done by utilizing the following formula, i.e.
1A = 1000mA
For example, assuming that your cell phone works with a current strength of 250mA, substitute the above formula to learn that your cell phone works with a current strength of 0.25A, so with the help of the above formula, you can realize the conversion of milliamps to amperes.
First of all, converting milliamps to amps is good for substituting in electrical formulas. For example, suppose you need to calculate the wattage of your cell phone, assuming that your cell phone operates at a voltage of 4V and a current of 300mA, first of all, to clarify the physical quantities, voltage (U), current (I), power (P) Calculate the wattage of your cell phone with the help of the following formula, i.e.
P=UI
Here the unit of current is A, so before you use this formula to calculate the wattage of your cell phone, you need to first take the help of the milliamps to amperes conversion formula, i.e., 1A=1000mA, which gives the current of your cell phone is 0.4A, and then substituting it into the above formula to calculate the wattage of your cell phone when it is working is 1.6W.
Secondly, converting milliamps to amps is to make it easy for you to get the exact parameters of your device. For example, suppose you want to use the unit of milliamps to express the current of your portable air conditioner, if your portable air conditioner operates at a current intensity of 10A, and the current intensity expressed in milliamps is 10,000mA, this data is obviously not as clear as the one in amperes, so you can see that converting milliamps to amperes is necessary in some cases.
Milliamps are commonly used to represent devices with smaller current strengths, including portable electronic devices (e.g. cell phones, electronic watches and tablets, etc.), small electronic components (e.g. LEDs and small sensors, etc.), and small household appliances (e.g. remote controls and computer mice, etc.).
And amperage is often used to express the current larger devices, including common household appliances (including refrigerators, portable air conditioners and automatic washing machines, etc.), industrial equipment (such as generators and transformers, etc.) and most of the rechargeable batteries (such as lithium iron phosphate batteries and lead-acid batteries, etc.).
In addition to milliamps and amperes there are other units of current intensity, they can also be seen in life, such as kiloamps (kA) and microamps (), etc., kA can be used to express the current intensity of ultra-high-voltage transmission, and microamps can be used to express the current intensity of very small electronic components in precision instruments, which can be realized through the following formula and the conversion between the amperage, i.e.
1A=1×1000,000μA
1A = 1×kA/1000
As an example, assuming that the voltage in an extra-high voltage transmission line is 20kA, you want to know the amperage of the current strength in this extra-high voltage line, substitute the above formula to get the amperage in the extra-high voltage line is 20,000A, which can be converted from kiloamperes to amperes.
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