How can the value 0.000001 Amp be expressed?

• A. 0.1 mA
• B. 0.001 mA or 1 µA
• C. 0.1 µA
• D. 1 mA

Answer: (B)

The value 0.000001 Amp can be expressed in different units of electric current. In the metric system, the most commonly used units for measuring current are Amperes (A), milliamperes (mA), and microamperes (µA).

To express 0.000001 Amp in milliamperes and microamperes:

• 1 milliampere (mA) is equal to 0.001 Amp. Therefore, to convert 0.000001 Amp to milliamperes:

0.000001 A = 0.000001 A / 0.001 A/mA = 0.001 mA.

• 1 microampere (µA) is equal to 0.000001 Amp, so:

0.000001 A = 1 µA.

Therefore, 0.000001 Amp can correctly be expressed as either 0.001 mA or 1 µA, which aligns perfectly with the choice provided. This demonstrates a clear understanding of how to convert between units of electrical current, emphasizing the importance of recognizing standard prefixes like "milli-" (m) and "micro-" (µ) in the context of these