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The depletion capacitance, $\mathrm{C}_{\mathrm{J}}$, of an abrupt $\mathrm{P}-\mathrm{N}$ junction with constant doping on either side varies with reverse bias, $V_{R^{\prime}}$ as

- $C_{\mathrm{J}} \propto V_{\mathrm{R}}$
- $\mathrm{C}_{\mathrm{J}} \alpha \mathrm{V}_{\mathrm{R}}^{-1}$
- $\mathrm{C}_{\mathrm{J}} \alpha \mathrm{V}_{\mathrm{R}}^{-1 / 2}$
- $\mathrm{C}_{\mathrm{J}} \alpha \mathrm{V}_{\mathrm{R}}^{-1 / 3}$