🔍 Key Concepts

• Basic electrical quantities: current, voltage, power, resistance • The relationship between Ohm's Law quantities (V, I, R) • Difference between units: ampere, volt, watt, ohm

💭 Think About

• Recall what physical quantity each option measures: which one is used for resistance, which for current, which for voltage, and which for power? • Think about Ohm's Law: V = I × R. Which symbol in that equation represents resistance, and what is its unit? • In basic electrical circuits on ships, when you talk about how much a conductor resists current flow, what unit do electricians use?

✅ Before You Answer

• Match each choice to its correct physical meaning: current, voltage, power, resistance • Verify which unit name is linked directly to Ohm's Law and the symbol R • Eliminate the options that you know are units for current, voltage, or power, not resistance