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−Q +Q + meter 0.86 V
Here we have an empty parallel plate capacitor, with capacitance C = Q/V. Let us see how inserting a dielectric material between the capacitor plates affects the capacitance.
−Q +Q + + meter 0.86 V
Since the two capacitor plates have opposite charges, there is an electric field between them. The dielectric will develop a polarisation in response to this field.