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In the metric system, the prefix “milli-” denotes a factor of one thousandth (1/1000). Therefore, one ampere (A) is equivalent to 1,000 milliamperes (mA). This relationship is fundamental in understanding how to convert between different units of current. The conversion can be illustrated as follows:

1 A = 1,000 mA.

This means that if you have one complete ampere of electric current, it is the same as saying you have 1,000 parts that are each one-thousandth of an ampere. Understanding this conversion is crucial in the field of electricity, particularly in contexts such as electrical safety and operational ranges of devices in both professional and personal use. Knowledge of these measurements enables better comprehension of electrical systems and is essential for anyone studying electricity or related fields.