Electrical Calculations

Slides:

Advertisements

Similar presentations

Factors Affecting Resistance

Advertisements

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

Electrical Energy Chapter 13 Section 3.

ELECTRICAL SYSTEMS 21.3.

Electrical Energy Use in the Home

Series Circuits One kind of circuit is called a series circuit. In a series circuit, the current has only one loop to flow through. 7.3 Electrical Energy.

 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.

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

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

Circuits & Electronics

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.

Electric Current & Electricity Calculations

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.

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

Bellringer What happens when you turn the lights on? What allows lights to be turned on and off? Write your answer or draw an explanatory picture for later.

Good Afternoon! 10/2/2015 Starter: On holiday lights, why is it that on some strings, when one bulb goes out, they all go out? Today we will be learning.

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

Final Exam Review Current, Power, Voltage, Resistance Ohm’s Law Series & Parallel Circuits Electromagnetic Induction.

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

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

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?

2 The Watt is the SI unit of Electrical Power. It is the “work done” by electricity, and is a value of work generated by 1 Amp flowing at a voltage of.

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.

Electric Circuits Prentice Hall: Electricity and Magnetism Chapter 2, Section 4 Mrs. Brunner Science Visit for review

Physical Science Mr. Barry. Series circuits have one loop through which current can flow.

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

Power and Energy Calculations. Power Ratings Power is the rate that an electrical device converts electrical energy into another form (ex. light or heat)

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?

 Phantom Load: The power used by something while turned off Another word for phantom load is standby power.

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) =

Section 7.3 Electrical Energy Circuits are pathways for electricity to flow. – Unlike static electricity, which is short-lived and fast, current flowing.

Energy & Power for APES Adapted from Maureen Goble.

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

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

Ohm’s Law and Power ELPT 1311 Basic Electrical Theory Chapter 04_Ohm’s Law Introduction to Electricity by Paynter & Boydell and Pearson Illustrations.

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

Power and Energy Energy Power

Physical Science 7.3 Electrical Energy.

Electrical Systems Series Circuits Parallel Circuits Electrical Power.

Power in DC Circuits.

Using Electrical Formulae

Energy Transfer & Transformation

Electricity Chapter 17.3.

Electric Circuits Part 2: power With Ms. Box.

Bellringer What happens when you turn the lights on? What allows lights to be turned on and off? Write your answer or draw an explanatory picture for later.

Electricity Calculations:

Physical Science 7.3 Electrical Energy.

IV. Measuring Electricity

Basic Electrical Calculations

Ch Electricity II. Electric Current (p ) Circuit

Modified by Mr. Wanninkhof

Electric Power.

Announcement Ohm’s law video is due at midnight Makeup lab today

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

Sources of Electricity

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.

Electric Energy Measurement, Units, and cost Your Electric Bill

Presentation transcript:

Electrical Calculations Unit 10 Section 3

I. How are electric current, voltage, and resistance related? a. Ohm studied resistance and found that the ratio of voltage (V) to current (I) is a constant for all materials. The ratio is the resistance (R) of the material. b. R = V / I OR V = I x R c. This means that as resistance goes up, current goes down. As resistance goes down, current goes up.

II. Electric Power a. Electric power is the rate at which electrical energy is converted into other forms of energy. This is the current in your house. b. We use this formula to find electric power: Power = voltage x current OR P = V x I

III. Watts and Kilowatts a. Watts are a unit of power. The higher the wattage, the more energy that is used. b. Kilowatts (kW) are another unit of power. One kilowatt is equal to 1,000 watts.

IV. Measuring Electrical Energy a. The formula for finding electrical energy used in your home is: Electrical energy = power x time OR E = P x t

V. Electric Meters a. Electric meters are used to determine how many kilowatt hours of energy are used in a house. b. Example: If 2 kW of power are used for 3 h, the total amount of energy used is 6 kWh.

How to Save Energy a. You can save energy by running appliances for less time, or by replacing old appliances with energy efficient appliances that use less energy.

Quickie Quiz Which of the following is Ohm’s law? E = P x t I = V x R P = V x I V = I x R

Quickie Quiz 2. How much electrical energy does a 40 W light bulb use if it is left on for 12 h?

3. How many watts are in 10 kilowatts? Quickie Quiz 3. How many watts are in 10 kilowatts?

Quickie Quiz 4. Circuit A has twice the resistance of Circuit B. The voltage is the same in each circuit. Which circuit has the higher current of electricity?