1, resistance: it is a physical quantity, which physically represents the resistance of a conductor to current.

2. Capacitance: it is an element that stores electricity and electric energy (electric potential energy).

Second, the role is different.

1, resistance: the size of resistance can be used to measure the resistance of a conductor to current, that is, conductivity. The size of resistance is related to the material, shape, volume and surrounding environment of the conductor.

2. Capacitance: This kind of capacitance circuit is widely used in capacitive coupling circuits such as resistance-capacitance coupling amplifiers, and plays a role in blocking DC and AC. This capacitor circuit is used in power supply filtering and various filtering circuits, and the filtering capacitor removes the signal of a certain frequency band from the total signal.

Third, the principle is different.

1, resistance: resistance is a characteristic of the conductor itself. Resistance will lead to the change of electron flux. The smaller the resistance, the greater the electron flux, and vice versa. Superconductors have no resistance.

2. Capacitance: It consists of polar plates at both ends and insulating dielectric (including air) in the middle. After electrifying, the polar plate is charged, forming a voltage (potential difference), but because there is an insulating substance in the middle, the whole capacitor is not conductive.

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