Question

What is the smallest unit of ampere?

Answer 1

The smallest unit of electric current is the ampere itself, which is the standard unit of measurement for electric current in the International System of Units (SI). However, when talking about smaller units of electric current, we often refer to:

1. Milliampere (mA): This is 1/1000 of an ampere (0.001 A).
   

1. Microampere (µA): This is 1/1,000,000 of an ampere (0.000001 A).
   

1. Nanoampere (nA): This is 1/1,000,000,000 of an ampere (0.000000001 A).
   

These are the common smaller units used when dealing with very small electric currents. So, the smallest practical unit would be nanoamperes (nA), but the ampere is still the fundamental unit.