Which symbol is used for current in circuit diagrams?

Which symbol is used for current in circuit diagrams?

• A. Voltage
• B. Resistance
• C. Power
• D. I

Answer: (D)

Current is spelled out in circuit diagrams using the symbol I. This naming convention—I for current, V for voltage, R for resistance, and P for power—is standard in physics and engineering. The magnitude of current is measured in amperes (A), and diagrams often show an arrow to indicate direction, with the current itself labeled I. The other quantities use their own symbols, so they don’t denote current. That’s why I is the correct symbol for current.

Current is spelled out in circuit diagrams using the symbol I. This naming convention—I for current, V for voltage, R for resistance, and P for power—is standard in physics and engineering. The magnitude of current is measured in amperes (A), and diagrams often show an arrow to indicate direction, with the current itself labeled I. The other quantities use their own symbols, so they don’t denote current. That’s why I is the correct symbol for current.