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level: Energy and Power [Circuits]

Questions and Answers List

level questions: Energy and Power [Circuits]

QuestionAnswer
So something that would supply Electricity, is also Suppling what?-Energy. The Electric Current Transfers Energy via the Power Supply.
How does Electric Circuits really Work? [Involving Energy]-Energy is given [Supplied] to a Charge at the Power Source, to 'Raise' it Through a Potential. [Like a Ski Lift] -This Charge will give its Energy away when it 'Falls' through a Potential Drop, in any Components.
If a Battery has a big Voltage, [Potential Difference] what would Happen to the Circuit? What about a Component with a High Resistance?-The Battery will give More energy to the Circuit Every Coulomb of Charge, which will flow around it -The Charge is Raised 'Higher' and can Transfer More energy in the Circuit -The Component with a High Resistance will need More Energy for the Charge to Transfer to Pass Through, its a Higher Drop in Potential Difference.
What is Power [In Circuits]-This is simply the Rate of Energy Transfer
What does the Power of a Component Tell you? Give the Formula for your Answer-This tells you How much Energy it can Transfer per Second -Power [P] = Energy Transferred [J] ......................---------------------------- ......................Time [s]
What is a Kilowatt Hour? Give me the Formula for Power using Kilowatt Hour as a Unit-This is really the Amount of Energy a Device [With a Power of 1kW or 1000W] Transfers in a Hours Operation. -Power [kW] = Energy Transferred [kWh] ........................--------------------------------- ............................Time [h, Hours]
How can you find out the Electrical Power of a Component? [Using pD and Current] Can Resistance be added for the Formula?-This can be done from the Potential Difference across the Component [in Volts], along with the Current passing it [in Amps] The formula is Below -Power [W] = Potential Difference [V] x Current [A or I] -Since you know Ohms Law {Potential Difference [V] = Current [A or I] x Resistance [Ω]} that means we have another way of getting Power. Formula is Below -Power [W] = Current² [A or I]² x Resistance [Ω] or -Power [W] = Potential Difference² [W]² ......................---------------------------------- ......................Resistance [Ω]