Question

find the impressed voltage across a DC fluorescent lamp that has a resistance of 12 ohms and takes a milliampere current

Answer 1

Hi! This fluorescent lamp will have an impressed voltage that can be calculated by Ohm's Law.
\[V=I\ R\]\(R\) is \(12\ [\Omega]\)
and
\(I\) is \(1\ [mA]\), or \(1\times 10^{-3}\ [A]\).