Sustainable Energy Lesson 5. Learning objective: To explain the link between the power rating and energy use of an electrical appliance. Must: Recall.

Slides:

Advertisements

Similar presentations

Electricity & Safety in the Home

Advertisements

P5 Electric Circuits. Question 1 How do you generate a current in a coil of wire?

Unit 4 – Electricity & Magnetism

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

POWER Noadswood Science, POWER To understand, and be able to calculate power Monday, August 10, 2015.

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

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

Measuring Electrical Energy Ch. 11. Energy: the ability to do work Electrical Energy: energy transferred to an electrical load by moving electric charges.

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

Electrical Devices 20 April, April, 2017 Objectives

Learning Outcomes Distinguish between Power and Energy. And use the equation Energy = Power x Time Use the equations: Units Used (kWh) = Power (kW) x Time.

Electricity. Starter:  What is current?  What is it measured in?  What is it measured by?  Which is the series and parallel circuit? (see board)

OCR 21 st Century Science Unit P3a Revision Sustainable energy.

Electrical Power Lesson Objectives:

Using Electrical Formulae Using the formulae you have been taught (V=IR, P=VI, Energy in kWh = kilowatts x hours) first of all work out which formula you.

Week 4 Lesson 1 POWER and Energy. P = I x V Power = Current x Voltage Voltage = Potential Difference.

Chapter 9.2 Power.

Understanding Electricity

13 Electric Circuits.

Electrical Appliances and Power. Learning Objectives To be able to calculate power, and cost of electricity To be able to apply these calculations to.

Cost of electricity Objectives Be able to calculate the cost of electrical devices. HSW: AF2: Evaluate the effects of technological developments on society.

E_E_T_I_I_Y 1.M K S J L 2.C L R C T 3.Y L J D F 4.D Q V Y K.

Measuring Electrical Energy.  Energy: the ability to do work.  Electrical Energy: energy transferred to an electrical load by moving electric charges.

Measuring Electrical Energy 11.2 & Energy: the ability to do work Electrical Energy: energy transferred to an electrical load by moving electric.

Household Appliances vocabulary.

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

Electrical Power is rate at which energy flows

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?

Current, Charge and Power Match up the electrical quantities, with their abbreviations and units. IVE powerampereΩ EnergyOhmsVoltage voltsresistancewatts.

Electrical power. What is electrical power? Electrical power is the rate at which an electrical appliance uses electrical energy. All appliances have.

Energy the Basics Lv3: Identify uses for electrical energy. Lv4: Define the term “Energy” Lv5: Explain what a powerstation is. Entrance activity Class.

By becoming energy aware at home and at school you can save lots of money.  The first step to saving energy is knowing how much you use in the first.

Most of our electricity in the UK is generated by fossil fuel burning power stations. WRITE 3 disadvantages of burning fossil fuels for electricity. (Pictures.

Power in Electrical Systems Power in Electrical Systems.

Chapter 34 Notes Electric Circuits. Electric Current Intro Voltage is an “electric pressure” That can produce a flow of charge, or current, within a conductor.

7.5 Electrical energy and power Electrical fundamentals Physics 2AB.

Power 3.1h power as energy transferred per unit time: E=Pt 3.1i The power transferred using: power = voltage × current (P=VI) power = current2 ×resistance.

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.

Electricity and Circuits

3.4 Domestic electricity slides

P1 Formulas and Questions.

Power and Energy Energy Power

Aim: How do we determine the power in a circuit?

Electrical Systems Series Circuits Parallel Circuits Electrical Power.

Measuring Electrical Energy

Power, Electrical Energy and Efficiency

Efficiency Hair dryer TV Lamp Toy Radio Heater Answer

Measuring Electrical Energy

Using Electrical Formulae

Power, Electrical Energy and Efficiency

Section 3.3 Measuring Energy Input and Output 1

Power of Electrical Appliances

Section 3.3 Measuring Energy Input and Output 1

To review and deepen understanding of key aspects of P5 including:

More electricity stuff

P1 Energy and Power.

The heating effect of an electric current

Power and electrical power

Equipment This lesson has a small focus on a new equation, other than that it is a small recap and equation practice. Calculators A r.

Power S Define electrical power as energy per unit time, and solve related problems. Include: P = E/t.

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.

Presentation transcript:

Sustainable Energy Lesson 5

Learning objective: To explain the link between the power rating and energy use of an electrical appliance. Must: Recall the definition for power and give its unit of measurement – Grade D Should: Be able to calculate power rating and energy used by an electrical appliance. - Grade C Could: Calculate the power of a range of appliances using an ammeter and a voltmeter – Grade B. Keywords: Power, current, voltage, watt and energy transfer.

Starter-Label the power station

How many did you get? 1. Furnace and boiler. 2. Turbine. 3. Generator. 4. Transformer.

Mains supply. What is the mains supply voltage to our homes? 230 V (volts). You need to remember this.

Do different appliances use different amounts of electricity?

Joules Energy is measured in Joules (J) We need to know how much energy something uses over time = a rate We can use Joules per second (J/s) 1 Joule / sec = 1 Watt (W) A 100W light bulb uses 100J of energy every second

Power When an electric current is passed through a device electric current is transferred from the supply to the device. The rate at which this energy is transferred is called POWER. Power is measured in WATTS (W).

Power Rating Different electrical devices have different power ratings They use different amounts of electrical energy over a given time. 15W 100W VS

P = I x V Power (Watts) = Current (amps) x Voltage (volts) Voltage = Potential Difference

Pee on the Ivy P = I x V

Task- Complete the table using the equation P=IV AppliancePower (w)Voltage (v)Current (A) Kettle Toaster Microwave Drill Door Lift Fax Machine CD player TV59230 Vacuum Cleaner Hairdryer Desk Lamp124.2 Sewing Machine Possible homework task

Task- Complete the table using the equation P=IV AppliancePower (w)Voltage (v)Current (A) Kettle Toaster Microwave Drill Door Lift Fax Machine CD player TV Vacuum Cleaner Hairdryer Desk Lamp Sewing Machine

The Watt 1 Watt = 1 Joule transferred in 1 second Power (W)= Energy (J) / Time (s)

DevicePower Rating (Watt) Time (sec)Energy (J) Kettle Energy = Power x Time Energy = 2400W x (180s) Energy = J

Electric Cooker: 10kW Fridge: 50W Freezer: 300W Washing machine: 500W Dishwasher: 1300W

Electric Cooker: 10kW. 45mins Fridge: 50W. 24hours Freezer: 300W. 24hours Washing machine: 500W. 1 hour Dishwasher: 1300W. 45mins

DevicePower Rating (Watt) Time (sec)Energy (J) Electric Cooker Fridge Freezer Washing Machine Dishwasher

Total energy use in one day: J or 63 million and 36 thousand Joules and Total Energy for 3 months: J or 5 billion, 6 hundred and seventy three million, 2 hundred and forty thousand Joules!

Plenary- True or False 1.Power is measured in watts? 2.Power= voltage / current? 3.Current is measured in volts? 4.Voltage is measured in volts? 5.Potential difference is another word for voltage? 6.I is the symbol for current? 7.The mains supply voltage to our homes is 240V? 8.The higher the power rating the more energy is used? 9.10 watts means 10 joules of energy every minute?