Which symbol and unit of measurement are used for electric current? symbol: A; unit: I symbol: C; unit: A symbol: I; unit: C symbol: I; unit: A

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First, bring the charged object close the the electroscope to induce the same charge on the leaves of the electroscope. Then, rub a rod with a paper towel to induce a positive charge on it and finally bring the charged object close to the electroscope. If the leaves repel, then the charge on the first object was positive and if they come together then the charge was negative.