Units Of Electricity Ashfield Direct Learning Holly Millar Ks4 Energy.

Slides:

Advertisements

Similar presentations

Electricity & Safety in the Home

Advertisements

P1.3 The usefulness of electrical appliances

Lesson 3: Buying Electricity.  MUST understand how electric current transfers energy  SHOULD calculate the cost of energy used  COULD use appropriate.

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

P1.3 Electrical Energy. Power Power (watts) = Energy Transferred (joules) Time (seconds) This means the more powerful something is, the more energy is.

Being energy wise Test your knowledge of energy use at school and at home.

Electrical energy consumption Section 9. Lighting 40 Watts 100 Watts 60 Watts.

Electrical Energy Use in the Home

12. 2 Using Electrical Energy Wisely. (Pages )

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

Connect the appliance to the power rating using an arrow! Appliance Kettle Iron Television Hair dryer Power rating (W) 1100W 65W 1800W 2000W.

Power Calculations Noadswood Science, 2011.

Measuring Electrical Energy Lesson 11. Measuring Electrical Energy What is Energy? Energy- The ability to do work Electrical Energy- The energy transferred.

 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.

Ch Electricity IV. Measuring Electricity (p )  Electrical Power  Electrical Energy.

© Oxford University Press 2011 IP Electricity meters Electricity meters.

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.

Power Ashfield Direct Learning Kirsten Lounds. Ks4 Energy.

Electrical Energy.  Electrical energy is the energy transferred to an electrical device by moving electrical charges. The energy used at home is measured.

Write down the energy transfers in the following:

ASSIGNMENT BOOK Unit 8 Part & Power of an Electrical Appliance & 8.11 Cost of Electricity A.Check your concepts Study each of the following.

Buying Energy20 Apr Class listSeating Plan Buying the POWER!!!! 20 Apr 2012.

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

Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.

Power Revisited.  Power is the rate at which work is done. P = W t  Since work = a change in energy, power is the rate at which energy (changes) is.

Paying for Electricity How much does it cost to watch T.V. for 2 hours?

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.

5.5 Power It takes time to change one form of energy into another. Physicists use the word power (P) to describe the rate at which energy is transformed,

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.

Energy and Cost. Energy  Energy: the ability to do work all appliances need energy to work ex.a hair dryer needs to be plugged in to get energy to work.

Calculate the missing quantities for the circuit below.

Chapter 6 Power. Chapter 6.1 Power in Mechanical Systems.

Power. Definition: The amount of energy converted to heat, light, sound or motion per unit of time Unit: Power is measured in watts (W) Naming: Named.

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

Do Now (10/10/13): What do Watts measure?

Electrical Power & Efficiency.  I will be able to calculate cost to operate and percent efficiency of various devices.

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.

Calculating Energy Use and Converting Units Chapter 2.

Electric Power Lesson 2.5. Key Concepts How do you calculate electric power? What factors are used to determine how people pay for electrical energy?

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) =

Buying electricity. Calculating the units of electricity The amount of electrical energy (i.e. the amount of electricity) used by an appliance depends.

P.1 Book 4 Section 3.1 Electrical power and energy Which one is brighter? Electrical power Power rating Check-point 1 Electrical energy Check-point 2 3.1Electrical.

P.1 Book 1 Section 2.2 Heat and energy transfer Hot spring Heat Power Check-point 2 2.2Heat and energy transfer.

Power in Electrical Systems Power in Electrical Systems.

Electrical Circuits Section 7.3. Electrical Circuits Circuits rely on generators at power plants to produce a voltage difference across the outlet, causing.

3.4 Domestic electricity slides

Power and Energy Energy Power

Electricity bills Assume cost per unit = 10p 1,000W = 1 KW

Energy Consumption: CO$T.

Energy Transfer & Transformation

Electrical Power & Energy

By: Michelle, Yeovani, Jalen

Electrical Calculations

Section 3.3 Measuring Energy Input and Output 1

9.2 The Power of Electricity

Electricity Calculations:

IV. Measuring Electricity

Section 3.3 Measuring Energy Input and Output 1

Energy Consumption at Home

Energy Consumption: CO$T.

Power Consumption & Cost

The Cost of Electrical Energy

Notes 7.3 : Calculating Electric Power + Electrical Energy

Presentation transcript:

Units Of Electricity Ashfield Direct Learning Holly Millar Ks4 Energy

What are units of electricity?  Electrical Units are a measure of the electrical energy used.  An Electrical Meter (like the one you will have in your home) measures the amount of energy used in Kilo-watt hours. Your meter at home may look like this………

The Kilowatt-hour  A kilowatt-hour is a unit of energy  It is used in calculating domestic electricity bills and is measured on a meter in the home  REMEMBER: it is NOT a unit of power…..that is the kilo-watt or watt!

Kilowatt-hour calculations…..  ENERGY TRANSFERRED (kWh) = POWER (kW) x TIME (h)  EXAMPLE : a 2000W electric hot plate is switched on for 90 mins…… E = P x t = 2kW x 1.5 hours = 3 kilowatt hours E P T

Examples of kilowatt-hours….  A 200 watt T.V set ……..transfers 1 kWh of energy if it is switched on for 5 hours  A 500 watt vacuum cleaner……..transfers 1kWh of energy if it is switched on for 2 hours