A constant current of 80 μA80\text{ }\mu\text{A}80 μA is supplied to an initially uncharged capacitor in the trigger circuit of a pulsed laser system. After a charging interval of 45 ms, the potential difference across the capacitor reaches 1.2 kV1.2\text{ kV}1.2 kV.
What is the capacitance of this capacitor?
3.0×10−12 F3.0 \times 10^{-12}\text{ F}3.0×10−12 F
3.0×10−9 F3.0 \times 10^{-9}\text{ F}3.0×10−9 F
3.0×10−6 F3.0 \times 10^{-6}\text{ F}3.0×10−6 F
4.3×10−3 F4.3 \times 10^{-3}\text{ F}4.3×10−3 F