Electrical energy The rate at which electrical energy is moved through a circuit is given in terms of power. The unit for electric power is the Watt (W)

Slides:

Advertisements

Similar presentations

Electrical Power The rate at which electrical energy is converted to another form of energy. Thermal, Light, Motion…

Advertisements

Conceptual Physics: Electricity: What is an electric field? - The space surrounding a charged object is affected by the presence of the charge; an electric.

Electrical Power Physics A Current #4. Learning Targets  I can predict and calculate power in a circuit.  I can explain energy transfer in a circuit.

Electrical Energy Use in the Home

Electric Circuits Chapter 20.3.

 Rate at which energy is consumed or produced  Changed into other forms of energy  Measured in WATTS (W)

Power and Energy. Power Power means work over a time period Units = Watts Electric power is measured in Watts.

Power Calculations Noadswood Science, 2011.

Lecture Seventeen Physics 100 Fall 2012  Electric Power and Energy.

 POWER: the rate of change in energy; also the rate at which work is done or energy is transformed  JOULE (J): the unit for measuring energy  WATT.

True or False? The voltage in a parallel circuit is the same across each parallel branch. In a parallel circuit the combined resistance is greater than.

Power and Electricity Cost Physics. Electric Power The proportional rate of the amount of current being sent through a circuit to the amount of voltage.

Electric Power, AC, and DC Electricity

Chapter 9.2 Power.

13 Electric Circuits. Chapter Outline 1 Electric Circuits and Electric Current 2 Ohm’s Law and Resistance 3 Series and Parallel Circuits 4 Electric Energy.

13 Electric Circuits.

The “Live Action” Physics Review Game Topic: Circuits.

Power. Your Utilization of Electricity Have you ever heard the word Watt before? Have you ever used the word Kilowatt before? When? When a person is speaking.

Electricity Electrical Power & Energy. Electrical Energy Every major appliance sold in Canada has either an “Energy Star” or “EnerGuide” label. Shows.

34.11 Electric Power Electric power is equal to the product of current and voltage.

Ch 8-9 Review. What is the current flowing through this circuit? 3 A.

Ohm’s Law & Electrical Power. Resistance - the tendency for a material to oppose the flow of electronsResistance - the tendency for a material to oppose.

Electrical Power Chapter 19 Section 3. Energy to Power Electrical Power is the rate of conversion of electrical energy. Electrical Power is the rate of.

Average Values & Other Antiderivative Applications Lesson 7.1.

Physics Day 23 Aim: How much power does a toaster use? LO: Calculate power use for V, I and R LO: Calculate energy use from power LO: Kilowatt-hour is.

 In a circuit, power is the rate that electricity is used  P= E/t  The unit for power is a watt (joules per sec)

4.2.3B Electrical Power What About Watts?. Power Law Moving electrons (current) requires ENERGY How much energy gets used depends on: Strength of push.

Calculating Electricity

Bellringer Two AA batteries in series will provide a voltage of how many volts?

Jag Mark In terms of electrons, how can an uncharged object become charged?

Paying for Electricity. Measuring Electrical Energy The electrical energy that you use at home is measured in kilowatt hours (kW  h) The images above.

Electrical Power & Energy Chapter 7-3. Electrical Power F Power is the rate at which work is done F Electrical energy is easily converted into other forms.

Chapter-13 Outline 1Electric Circuits and Electric Current, I 2 Ohm’s Law, ΔV = I R; and Resistance, R. 3 Series and Parallel Circuits 4 Electric Energy.

The SI unit of electric potential; symbol is V

Calculate the missing quantities for the circuit below.

Chapter 6 Power. Chapter 6.1 Power in Mechanical Systems.

Power, Work and Energy in Electrical Circuits. Potential Difference 1 V = 1 J 1 C.

Electrical Calculations. Ohm’s law describes the relationship between current, resistance, and voltage. As voltage increase, current increases As resistance.

Power. Energy Transformation Electric energy can be transformed into other more useful forms Power is the rate of energy transformation P = ΔPE/t ΔPE.

Electricity Notes 5 Electric Power – the rate at which _______________________ the rate at which _____________________ is converted into another form of.

Electrical Power is rate at which energy flows

Power. Your Utilization of Electricity Have you ever heard the word Watt before? Have you ever used the word Kilowatt before? When? When a person is speaking.

Topic 7: Measuring Electric Power. Getting electricity to your home Power generating station  transmission lines  home Step- up transformer Step- down.

Energy Consumption Energy consumption is measured in kilowatt. hours. A kilowatt hour is the amount of energy being consumed per hour. –Energy (kwh) =

Ohm’s Law Notes JAN 7. Vocabulary current : how quickly the electrons are flowing through the circuit; units: amperes (A) voltage : the electric potential.

Outline 1 Electric Circuits and Electric Current 2 Ohm’s Law and Resistance 3 Series and Parallel Circuits 4 Electric Energy and Power 5 Alternating currents.

Power in Electrical Systems Power in Electrical Systems.

Chapter 6.3 Notes Electrical Power. Voltage causes charges to move in circuits. This movement creates work. How fast the charge does work is called Power.

Energy Calculations Revision Energy = Power x Time (Joule) (Watt) (Second) Energy Power x Time Example 1: How much energy does a 40 Watt bulb use in 2.

Electrical Systems Series Circuits Parallel Circuits Electrical Power.

Ohm’s Law & Electrical Power

Power in DC Circuits.

Do Now (Homework due right now) How much current does a 30 ohm resistor draw over 90V?

Comprehension Check You have three 75Ω resistors; what is the effective resistance if: They are placed in series They are placed in parallel Find the effective.

By: Michelle, Yeovani, Jalen

Electrical Calculations

Power, Electrical Energy and Efficiency

Power of Electrical Appliances

Chapter-13 Outline Electric Circuits and Electric Current, I

Average Values & Other Antiderivative Applications

Basic Electrical Calculations

Topic 8: Current, Voltage and Resistance Electric Costs

Electric Power.

Unit 2: Electricity Lesson 7: Power

Warm up A light needs 3 amps to produce light the resistance of the bulb is 1.5 ohms. How many batteries do you need if each battery is 1.5 volts? What.

Notes 7.3 : Calculating Electric Power + Electrical Energy

20.1 Short circuit A short circuit is a parallel path in a circuit with zero or very low resistance. Short circuits can be made accidentally by connecting.

Warm up 2/18 Explain Power What formula do you use to calculate the power used in a circuit? How can you know how much current will flow or how much voltage.

Presentation transcript:

Electrical energy The rate at which electrical energy is moved through a circuit is given in terms of power. The unit for electric power is the Watt (W)

The common unit for electric energy is the kilowatt-hour (kW-hr) Ex: A dishwasher draws 10. A of current from a 120-V source. The power expended by this circuit is: The amount of electrical energy consumed by a circuit can be calculated by: The common unit for electric energy is the kilowatt-hour (kW-hr)

Ex: If the dishwasher runs for 1 Ex: If the dishwasher runs for 1.5 hours each day, the cost to run it for a 30-day month, at 8 cents per kilowatt-hour, is:

Two other useful equation forms for calculating electric power:

A 2510-W air conditioner has an electrical resistance of 11. 0 Ω A 2510-W air conditioner has an electrical resistance of 11.0 Ω. What current will it draw from the voltage source?

The power supplied by a voltage source is 72 W The power supplied by a voltage source is 72 W. If the resistance of the circuit is 8.0 Ω, what is the voltage of the source?