How many microamps are there in one amp?

• A. 1,000.
• B. 10,000.
• C. 1,000,000.
• D. 100,000.

Answer: (C)

In the context of measuring electrical current, it is essential to understand the relationship between different units. One ampere (amp) is a fundamental unit of electric current in the International System of Units (SI). When converting larger units of current into smaller units, you express them in terms of amps, milliamps, microamps, and so forth.

One microampere (uA) is one-millionth of an ampere. Therefore, to convert amps to microamps, you multiply the number of amps by 1,000,000. Thus, in one amp, there are 1,000,000 microamps. This conversion is based on the metric system, where the prefix "micro" denotes a factor of (10^{-6}).

This understanding is critical for accurately working with electrical measurements and ensuring proper calculations in practical applications.