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'I' stands for current. It comes from the French word intensité , used by French scientist André-Marie Ampère to describe the 'intensity of the electric current.' This has been absorbed into international usage.

Example: V=IR. (Voltage=Current*Resistance)

The units of current are amperes, named after André-Marie Ampère, and symbolized by 'A'.

Example: This battery has a current of 0.25A.

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15y ago

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