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

Slides:

Advertisements

Similar presentations

April 26 Physics. Homework #4 In: Label each diagram as series or parallel:

Advertisements

Circuits & Circuit Diagrams

L 25 Electricity and Magnetism [3] Electric circuits what conducts electricity what doesn’t conduct electricity Current, voltage and resistance –Ohm’s.

Bell Ringer R30 What do you think a circuit looks like if you would draw a picture? Include in picture: battery, wires, and a lightbulb.

Chapter 13 Electricity!. Quick review: Conductors Insulators Like charges ___________ and unlike charges _____________. Repel Attract.

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

Electrical Resistance and Ohm’s Law. The Electric Current  Electric current is a measure of the rate at which electric charges move past a given point.

Current Electricity.

Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law.

Electrical Energy - Moving electrons in a path is electricity

Electric Circuits A circuit is a path where a current can flow If the flow is to be continuous, the can be no gaps in the path Introduce gaps in the form.

Lab 2: Ohm’s Law Only 10 more labs to go!!

Current Electricity. Current A measure of the flow of charge. Ampere: Electrical measurement of the flow of electrons. 1 Ampere = 1 Coulomb/second. 1.

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 Potential (Voltage) Answers (Page 303)

Dr. Jie ZouPHY Chapter 21 Electric Current and Direct- Current Circuits.

Electrical Current Mr. Fleming.

Current - rate at which charge passes a given point.

Moving Electricity If charges in a conductor (like a metal) are connected to a battery or source of electric potential difference, they will move.

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

Electric Current and Ohms Law. Electric Current The continuous flow of electric charge –The two types of current are direct current (DC) and alternating.

Circuits with more than one resistor, then Watt happens? Series and Parallel are the 2 ways of connecting multiple resistors.

Electrical circuits. Intensity (I): Number of charges that flow past a given point every second. Measured in Amperes (A). Wires that carry the electrical.

Electrical Resistance Electrical resistance is a measure of how difficult it is for electricity (electrons) to flow through a material. The units of resistance.

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

Electric Circuits. Potential Electric Potential is just like gravitational potential It depends on –The distance from the source –The amount of charge.

Electric Current and Circuits Physics. Current The flow of charges Rate at which electric charges (+ or - ) pass through a conductor – Charge passes per.

Electric Current. In this session we will, Review how we measure electric charge Discuss voltage and electric current Look at electric current in batteries.

Series and Parallel Wiring GET A CALCULATOR!!!!!.

 Electric Current- net movement of electric charges in a single direction ◦ Example- powering electronics.

ELECTRIC CURRENTS. SIMPLE CIRCUIT What’s providing the energy? What’s “moving” in the circuit? What’s causing the movement? e.m.f. = Electromotive Force.

Electricity It’s Shocking!!. Current Electricity Current Electricity is a constant flow of electrons through a circuit. There are three main parts to.

T By iTutor.comiTutor.com.

Circuit Electricity May 30, 2012 Chapter 22. Terms  Current: Flow of charge  Symbolized by “ I ”  Units = Coulombs/second = Amperes (A)  Circuit:

 Electrical circuit: a closed loop where charged particles flow  Electrical current: a flow of charged particles (e - )  Direct current (DC): a flow.

Electric Current. Ohm’s Law

The Control of Electricity in Circuits

16.2 Current and Voltage. Electric Current (review from yesterday) Electric current: the flow of electric charge (movement of electrons)

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

 Circuit = Complete path where electrons can flow  Circuit diagram symbols:  Wire/Conductor  Resistor (light bulbs, fans)  Battery  Switch.

Electricity and Circuit. Types of Electricity Static Electricity – no motion of free charges Current Electricity – motion of free charges – Direct Current.

Electricity Part 2: Electric Current. Definition of current Electric current is the amount of charge moving through a surface in a time interval I = current.

The flow of charged particles charged particles ; through a conducting metal.

Electric Current Chapter 34.2, 34.4, 34.5, and Notes.

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

Chapter 22 Current and Resistance. Contents Electric Current Batteries and EMF Resistance and Resistivity Ohm’s Law and simple circuits Energy and Power.

WARM UP Draw a picture of a SERIES Circuit. Show a battery, a switch, and a light bulb in your drawing. Draw a picture of a PARALLEL Circuit. Show a battery,

Electricity and Circuit

through a conducting metal

Electricity, Sound and Light

Current Current Electricity - involves the flow of electrons in a conductor Such movement of these free electrons creates an electric current.

Electrical Potential Joules units: = Volt = V Coulomb

Chapter 7 section 2 Electric Current

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.

Current Current Electricity - involves the flow of electrons in a conductor Such movement of these free electrons creates an electric current.

Electric Current.

Modified by Mr. Wanninkhof

Chapter Twenty: Electric Circuits

Physics 3 Electricity and Magnetism

Electricity II. Electric Current Circuit Potential Difference Current

Please bring your book tomorrow.

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

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

Electric Resistance describes how an electrical conductor (wire) opposes the flow of a current (flow of electrons) to overcome this opposition a voltage.

Presentation transcript:

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

Electric Circuits Charges move when there is a difference in electric Potential. Electric Potential (think of potential energy) is called electric Voltage Voltage is the driving energy for a circuit and it causes charges to move around. Charges move around and deliver energy (charges are like the tennis balls, these tennis balls (charges) carry energy (volts) which can be delivered to something in the circuit (like a light bulb) The movement or flow of charges is called electric current (coulombs/sec = amps) Current is measured in amps, the symbol for current is I.

Electric Circuit Simple circuit

Electric Current The amount of electric current depends on the amount of Voltage applied (think of the amount of energy available) and depends on the resistance in the circuit For circuits we often use the analogy of flowing water. Voltage = water pressure, current = flow rate, and resistance is the size of the pipe (or friction in the pipe)

Electric circuits Resistance is measured in Ohms. Light bulbs, toasters, hair dryers, etc. and basically just resistors which use up energy. Ohms law : relates how much current flows in a circuit. Ohms law: V = I x R, Voltage = current x resistance.

Ohm’s law: V = I x R Example: How much current (I = amps) does a lightbulb (R = 20 ohms) use when connected to 120V (typical voltage in your house)? V = I x R, or I = V/R = 120V/20ohms = 6amps

Electric Power Lightbulbs are rated in power units = watts. Power = energy per time. For electric circuits, P = V x I.

Summarize circuit terms Voltage: This is the amount of electical energy supplied. Charges carry around energy and transfer this to things like lightbulbs. Current: This is the flow of charges or how many charges flow per second. Measured in Coulombs/sec = Amp (symbol is I) Resistance: A light bulb acts like a resistor which uses up energy Ohm’s law (relates the above 3 terms: V = I R) or Voltage = Current x Resistance.

Electric Circuits V(volts) = I(current) x R (resistance) P (power) = V x I = V 2 / R = I 2 x R P = power =energy/time = joules/sec = watts I = current = coulombs/sec = amps R = resistance = ohms V = Volts (energy) = joules/coulomb