Which letter represents current in Ohm's law?

Which letter represents current in Ohm's law?

• A. E
• B. R
• C. I
• D. P

Answer: (C)

Current is the flow of electric charge. In Ohm's law, V = I R, the letter I represents current. It tells you how much charge passes a point each second, measured in amperes (A). Voltage, the potential difference, is typically shown as V (though E is used in some texts for electromotive force), and resistance is R in ohms (Ω). Power is P, given by P = V I or I^2 R, so it isn’t the symbol for current itself.

Current is the flow of electric charge. In Ohm's law, V = I R, the letter I represents current. It tells you how much charge passes a point each second, measured in amperes (A). Voltage, the potential difference, is typically shown as V (though E is used in some texts for electromotive force), and resistance is R in ohms (Ω). Power is P, given by P = V I or I^2 R, so it isn’t the symbol for current itself.