🔍 Key Concepts
• Difference between energy, charge, power, and potential difference in basic electricity
• Standard SI units: joule, coulomb, watt, volt and what each one measures
• How energy stored in a capacitor’s electric field is described in physics/electrical theory
💭 Think About
• First decide which choice is the unit of energy, not charge, not power, and not voltage.
• Think about a capacitor: when it’s charged, what physical quantity is actually stored in its electric field?
• Match each option to its proper definition (for example, which one is charge, which is power, which is potential difference?) and see which matches “amount of electrical energy.”
✅ Before You Answer
• For each option, write what it measures: energy, charge, power, or potential difference.
• Confirm that the correct choice is the SI unit of energy in both mechanical and electrical contexts.
• Make sure you are not mixing up power (rate of using energy) with energy itself.