What is electric current, potential difference and resistance?

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What is electric current, potential difference and resistance?

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Think of water flowing in a pipe the current is the rate of flow ie litres per minute (Amps) potential difference is the difference in pressure from one end of the pipe to the other (which promotes flow) (Voltage) The resistance is the amount of energy lost in the pipe, this will be due to the roughness of the inside, the no.