Charge on the capacitor in the given circuit in steady state condition is :- ............... $\mu C$
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At steady state, no current through the capacitor hence

current in circuit $=\frac{12}{8}=\frac{3}{2} \mathrm{\,A}$

$\mathrm{V}_{\mathrm{A}}-\mathrm{V}_{\mathrm{B}}=9 \mathrm{V}$

$\mathrm{q}=\mathrm{C}\left(\mathrm{V}_{\mathrm{A}}-\mathrm{V}_{\mathrm{B}}\right)$

$=2 \times 9=18\, \mu \mathrm{C}$

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