Students Prepare : Abdullah Al Asfour. Samer Al Gamdi. How voltage, current and resistance relate ?

Slides:

Advertisements

Similar presentations

Advertisements

What is Electricity? Electricity is the flow of moving electrons. When the electrons flow it is called an electrical current.

Use Ohm’s Law to solve the following equations.

Aim: How can we explain electric current and resistance? Do Now: Two charged plates are connected by a wire conductor. What will happen? + -

Current and Resistance

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

Current Electricity.

Unit 3 Day 1: Voltage, Current, Resistance & Ohm’s Law Batteries Electric Current Conventional Current Resistance Resistors Energy Dissipated in a Resistor.

Do Now What work is required to move 7 coulombs of charge through a potential difference of 3 volts?

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

 Georg Simon Ohm   German  Physicist  HIGH SCHOOL TEACHER!!!!

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.

Circuits and Ohm’s Law Objectives: 1. Gain an understanding of Ohm’s Law. 2. Compare and contrast the movement of current through a series and parallel.

Electric Current and Resistance Chapter 19 Sections 1 & 2.

“Introduction to Circuits”

Ohm’s Law Conductor A conductor is a material that current can pass through easily, like metals.

ELECTRIC CURRENT 2 Ohm’s law shows the relationship between current, potential, and voltage. We need a few more rules to make predictions about current.

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

Voltage, Current, Resistance and Power. Voltage Voltage is the ____________________________ through an electric circuit. Voltage is measured in _____.

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

describes the relationship between current, voltage, and resistance greater the voltage across a device with resistance, the greater the current through.

13.2 & Current Definition: Flow of electric charge How many electrons pass a given point each second Water Analogy: Rate at which water flows Units:

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.

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

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

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

 It is the push or pressure behind current flow through a circuit, and is measured in (V) volts.

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

Physics A First Course Electricity Chapter 13.

Methods of Charging Conduction – A Charged Object comes in CONtact with a neutral object. – The neutral object takes on the same Net Charge as the Charged.

Amperes, Volts and Ohms. We use different units to measure different things: We use different units to measure different things: Time – minutes Time –

1 Igniting the Spark of Science! Electricity & Electronics Bruce E. Amrein, MES, MBA, CTS Thomas Alva Edison (1847 – 1931) Nikola Tesla (1856 – 1943)

Ohm’s Law PSSA Requirement Unit 9 Honors Physics.

Circuit Electricity. Circuit Builder Interactive: Builder/Circuit-Builder-Interactive.

What do you think? What do you think these four pictures have in common?

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

What is Voltage? Remember, current is the flow (per second) of quantities of electrons past a point in a circuit. if 0.1 C of electrons pass this place.

Ohm’s Law Aim: How does voltage and resistance affect current flow?

Ohm’s Law. Georg Simon Ohm born March 16, 1789, Erlangen, Bavaria [Germany]—died July 6, 1854, Munich German physicist who discovered the law, named after.

Bruce E. Amrein, MES, MBA, CTS

Current Electricity.

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,

Science 9 Ohm’s Law.

through a conducting metal

Aim: How is a Series Circuit different from a Parallel Circuit?

Voltage, Current, and Resistance

Do Now: Why does current not come from a battery? Explain.

ELECTRICAL CIRCUITS All you need to be an inventor is a good imagination and a pile of junk. -Thomas Edison.

Review of Calculations

Electrical Potential Joules units: = Volt = V Coulomb

Chapter 7 section 2 Electric Current

Electrical Circuits.

Electrical Circuits.

Topic H: Electrical circuits

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.

Voltage, Current, Resistance & Ohm’s Law

Resistance How much energy does it take to push a coulomb of charge across a filament? Defined as the ratio of POTENTIAL DIFFERENCE across the LOAD POTENTIAL.

Modified by Mr. Wanninkhof

Science 9 Electricity Review.

Please bring your book tomorrow.

Ohm’s Law & Circuits Chapter 7.2 & 7.3.

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

Presentation transcript:

Students Prepare : Abdullah Al Asfour. Samer Al Gamdi. How voltage, current and resistance relate ?

By Ohm’s Law..

Introduction :

Voltage and Current analogy :

Current : - It is the rate of flow of charge. - The symbol is I. - It is measured in amps (ampere) A. (for example I=5 A or I=5 amps). - Current cannot flow without voltage.

Current :

Voltage : - It is a measure of the energy carried by the charge. - It attempts to make a current flow. - The Symbol is : V or E. - - It is described as a “push” of the electric current. - - It is measured in Volts (V=1.5v).

Voltage : Voltage is supplied by..

Resistance : - It is the impedance of the current flow. - The symbol is R. - All electrical equipment has an internal resistance. - - It is measured in ohms Ω.

Resistance :

Current, Voltage and Resistance :

Georg Simon Ohm (16 March 1789 – 6 July 1854)

Ohm's Law : - To make a current flow through a resistance there must be a voltage across that resistance. - Ohm's law shows the relationship between the voltage (V), current (I) and resistance (R). - V = I * R - I = V / R - R = V / I.

How to decrease the flow rate without change the pressure ?

How to increase the flow rate without change the resistance ?

How to decrease the pressure without change the flow rate ?

The relationship between Current, Voltage and Resistance :

Examples..

E1 : Find the voltage ?

E2 : Find the lamp resistor ?

E3 : Find the current ?

Exercises..

Exercises : Q1 : A 3 V is applied across a 6 ohm resistor, what is the current ? Q2 : lamp connected to a 6 V battery passes a current of 60 mA, what is the lamp's resistance ? Q3 : A 1.2 k ohm resistor passes a current of 0.2 A, what is the voltage across it ?

Exercises : A1 : A2 : A3 :

Summery - Voltage measured in volts, symbolized by the letters “E” or “V”. - Current measured in amps, symbolized by the letter “I”. - Resistance measured in ohms, symbolized by the letter “R”. - Ohm’s Law : V = I * R - I = V / R - R = V / I.

Any Questions ?

Recommended websites :

Thank You For Attention..