How is 0.0500A expressed in milliamps?

To convert amperes (A) to milliamps (mA), it is essential to recognize that 1 ampere is equal to 1,000 milliamps. Therefore, to convert 0.0500A into milliamps, you need to multiply the value in amps by 1,000.

Calculating this gives:

0.0500 A × 1,000 = 50 mA.

Thus, 0.0500A is expressed as 50mA, which is the correct representation of the conversion process from amperes to milliamps. This underscores the important relationship between these two units of current measurement. The choice that reflects this accurate conversion is the correct answer.