Pinpoint #834 answer: Electric current, Personal pronoun, Square root of -1, Iodine, Roman numeral for 1

I

Different meanings of the letter “I”

1. Pinpoint #834 clue 1: Electric current

   I as current. In physics, I is the symbol for electric current, measured in amperes.

2. Pinpoint #834 clue 2: Personal pronoun

   I as pronoun. The word I is a personal pronoun that speakers use to refer to themselves.

3. Pinpoint #834 clue 3: Square root of -1

   I as imaginary unit. In mathematics, i is the square root of -1, the basis of imaginary numbers.

4. Pinpoint #834 clue 4: Iodine

   I as iodine. I is the chemical symbol for iodine, element number 53.

5. Pinpoint #834 clue 5: Roman numeral for 1

   Roman numeral I. I is the Roman numeral for 1, the first number in the system.

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