What is the SI unit for current?

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Study for the Con Edison Basic Electric Test. Prepare with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What is the SI unit for current?

Explanation:
Current is the rate at which electric charge flows past a point in a circuit. The SI unit for that rate is the ampere (A), defined as one coulomb of charge passing a point every second. This makes sense because more charge per second means a larger current. The volt measures electric potential difference, the ohm measures resistance, and the watt measures power. These relate through I = V / R and P = V × I. For example, with 3 volts across a 1-ohm resistor, the current is 3 amperes and the power is 9 watts.

Current is the rate at which electric charge flows past a point in a circuit. The SI unit for that rate is the ampere (A), defined as one coulomb of charge passing a point every second. This makes sense because more charge per second means a larger current. The volt measures electric potential difference, the ohm measures resistance, and the watt measures power. These relate through I = V / R and P = V × I. For example, with 3 volts across a 1-ohm resistor, the current is 3 amperes and the power is 9 watts.

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