What is one-thousandth of an ampere called?

One-thousandth of an ampere is known as a milliampere. The milliampere is a unit of electric current equal to 0.001 amperes, which is a common measure used in various electrical and electronic applications. The milliampere is particularly useful when dealing with small currents, such as those found in electronic devices, medical equipment, and electrolysis procedures, where precise current measurements are crucial for safety and effectiveness.

Understanding the milliampere helps in grasping how electric currents operate at different scales and ensures proper dosage during electrolysis treatments, ensuring that practitioners can provide effective services without exceeding safety limits. The other terms, such as microampere, millivolt, and centiampere, represent different units or measures that do not correspond to one-thousandth of an ampere, making it clear why the milliampere is the correct answer in this context.