A1
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What is the minimum voltage $V_{\min}$ that must be applied to a discharge lamp for it to light up?
A2
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Find the expressions for the equilibrium current through the lamp and the voltage across the lamp.
B1
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Express the current and voltage on the lamp at some time through the concentration of electrons $n_\mathrm e$.
B2
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Considering $n_\mathrm e$ to be nearly constant, average the equation for the concentration over time and find the equilibrium value of the electron concentration $n_{0}$.
B3
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Find $n_1$ and $\phi$.
H1
You will only need to consider terms with $\cos(2\omega t)$ or $\sin(2\omega t)$
H2
If you have a linear trigonometric equation, it is more convenient to rewrite it in complex notation
B4
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Determine $\delta$ for the lamp assuming $\delta\ll1$. What does this smallness condition correspond to in terms of the initial variables of the problem?
