[M⁻¹ L⁻² T⁴ I²]. Capacitance is the charge per unit voltage (Q/V), and voltage is work done per unit charge (W/Q). Hence, we can write capacitance as Q²/W.
The dimensional formula for the charge is [I T], and work is [M¹ L² T⁻² ]. Consequently, the dimensional formula for capacitance is [M⁻¹ L⁻² T⁴ I²].
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