Correct Answer - Option 1 : 0.045 A
Concept:
A milliampere (symbol: mA) is a submultiple of the SI base unit of electrical current, the ampere. It is defined as one-thousandth of an ampere.
Analysis:
Given:
I = 45 mA
To convert it to Ampere, we need to divide it by 1000.
\(I = \frac{45}{1000} = 0.045~A\)