Chapter Twenty: Electric Circuits

Slides:

Advertisements

Similar presentations

Unit 7 Parallel Circuits

Advertisements

What happens to the brightness of each bulb in a series circuit…

Quarter 3 Test 2 Review. 1 Typically, household appliances operate at 120 volts. What is the current flowing in the circuit of a microwave when the resistance.

Chapter 7. Voltage Remember: Atoms are in EVERYTHING and they are made up of equal amounts of positive and negative charges. Battery: uses chemical energy.

Electric Circuits Part One: Electric Circuits.

Unit 14: Electricity Part One: Electric Circuits.

1 DC ELECTRICAL CIRCUITS POWER. 2 DC ELECTRICAL CIRCUITS Power is the rate at which electrical work is done in a specific amount of time. Earlier you.

Use Ohm’s Law to solve the following equations.

Ohm’s Law Review. Division Review 15 ÷ ÷ ÷ 2.3.

Ohm’s Law The most important fundamental law in electronics is Ohm’s law, which relates voltage, current, and resistance. Georg Simon Ohm ( ) studied.

Chapter Twenty: Electric Circuits

Investigation 16B  Key Question: What is the relationship between current and voltage in a circuit? Resistance and Ohm’s Law.

Electrical resistance Resistance measures how difficult it is for current to flow.

Electrical Potential (Voltage) Answers (Page 303)

Electrical Current Mr. Fleming.

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.

Chapter 7 Electricity. What is Charge? Protons have a (+) charge Electrons have a (-) charge Charge (q) is measured in Coulombs The elementary charge.

Calculating Electricity

“Introduction to Circuits”

Bellringer A standard household outlet has a voltage of what?

CHAPTER 2 ELECTRICAL QUANTITIES AND OHM’S LAW. OBJECTIVE. AFTER TODAY, STUDENTS WILL UNDERSTAND THE ELECTRICAL VALUES OF AMPS, VOLTS, OHMS,AND WATTS.

 Measuring current may be accomplished by using a meter called an Ammeter  This meter is placed in the path of the electron flow, and reads the flow.

Electric Current, Resistance and Ohm’s Law

1 Chapter 20 Review activity! Fun in B208!.  A. Unit of energy  B. Unit of charge  C. Unit of current  D. Unit of voltage. 2 What is a coulomb?

Chapter 8. Ohm’s Law  George Ohm experimented with circuits and came up with a mathematical relationship relating voltage, current and resistance in.

Electric Circuits and terms Electric circuits move charges around to deliver energy.

Electric Current. Ohm’s Law

ELECTRIC CIRCUITS. Chapter Twenty: Electric Circuits  20.1 Charge  20.2 Electric Circuits  20.3 Current and Voltage  20.4 Resistance and Ohm’s Law.

ELECTRIC CIRCUITS 20.4.

UNIT FIVE: Electricity and Magnetism  Chapter 16 Electricity  Chapter 17 Magnetism.

Electric Current. Electric Current (I) The net movement of electric charges in a single direction ▫Unit - amperes  Symbol – A  Measurement instrument.

Chapter Twenty: Electric Circuits  20.1 Charge  20.2 Electric Circuits  20.3 Current and Voltage  20.4 Resistance and Ohm’s Law.

13.3 RESISTANCE & OHM’S LAW; PP Objectives: 1) Explain the relationships between current, voltage, and resistance 2)Use Ohm’s Law to calculate.

Hosted by Mr. McDevitt Voltage CurrentPower Short Circuit

Electric Current. Charge in motion (“flow” of charges). Charge in motion (“flow” of charges). Current: The number of electrons that pass a specific point.

Solving Problems 14.1 & A circuit contains 5-ohm, 3-ohm, and 8-ohm resistors in series. What is the total resistance of the circuit? Rt = R1.

Measuring Electricity. Electric Potential – the electrical energy that an electron possesses. Electric current is a measure of the rate at which the electric.

Power in Electrical Systems Power in Electrical Systems.

Jag Mark Name 4 factors that can affect the resistance of a current?

Warm-up How much power is dissipated by an electric heater connected to a 120V outlet when a current of 12 amps passes through it? What are electric components?

Chapter Twenty: Electric Circuits

Determining Equivalent Resistance

Electric Current Electric current – The net movement of electric charges in a single direction through a wire or conductor. Voltage difference – The force.

ELECTRIC CIRCUITS.

UNIT FIVE: Electricity and Magnetism

Voltage, Current, and Resistance

Unit 7 Parallel Circuits

Electricity, Sound and Light

Series Circuit – 1 bulb Series Circuit – 1 bulb.

Ch Electricity II. Electric Current (p ) Circuit

16.3 Resistance and Ohm’s Law

Ch Electricity II. Electric Current Circuit Potential Difference

Ohm's law magic triangle

Chapter 7 section 2 Electric Current

Resistance Year 9 Science.

Ohm’s Law If the current I = 0.2A and the resistance R = 1000 ohms, solve for voltage. If V = 110V and R = ohms, how much current is flowing through.

Ohm’s Law The relationship between voltage, current and resistance is known as Ohm’s Law: V = IR Voltage (V) = Current (I) x Resistance (R) Volts.

Chapter Twenty: Electric Circuits

Chapter Twenty: Electric Circuits

Chapter Twenty: Electric Circuits

Chapter Twenty One: Electrical Systems

Electricity II. Electric Current Circuit Potential Difference Current

Ohm’s Law Page

Ohm’s Law & Circuits Chapter 7.2 & 7.3.

Voltage Difference The difference in electrical potential between two places. Unit of measure = V (volts) Voltage causes current to flow through an electric.

Hosted by Mrs. McDevitt 

Presentation transcript:

Chapter Twenty: Electric Circuits 20.1 Charge 20.2 Electric Circuits 20.3 Current and Voltage 20.4 Resistance and Ohm’s Law

20.4 Resistance Resistance is the measure of how strongly an object resists current flowing through it. The relationship between electric current and resistance can be compared with water flowing from the open end of a bottle.

20.4 Resistance The total amount of resistance in a circuit determines the amount of current in the circuit for a given voltage.

20.4 Resistance Electrical resistance is measured in units called ohms. This unit is abbreviated with the Greek letter omega (Ω).

20.4 Ohm’s Law The current in a circuit depends on voltage and resistance. Ohm’s law relates current, voltage, and resistance with one formula.

20.4 Ohm’s Law If you know two of the three quantities, you can use Ohm’s law to find the third.

How much current does it draw? Solving Problems A toaster oven has a resistance of 12 ohms and is plugged into a 120-volt outlet. How much current does it draw?

Solving Problems Looking for: Given Relationships: Solution …current in amps Given …R = 12 ; V = 120 V Relationships: I = V R Solution I = 120 V 12  = 10 A

20.4 Resistance of common objects Every electrical device is designed with a resistor that causes the right amount of current to flow when the device is connected to voltage.

20.4 Resistance of common objects The resistance of many electrical devices varies with temperature and current. A light bulb’s resistance increases when there is more current because the bulb gets hotter when more current passes through it.