Circuits A circuit is any directed path which includes:

Slides:

Advertisements

Similar presentations

Electric Current And Ohm’s law.

Advertisements

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.

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.

Before we get started, let’s review: Describe a Series Circuit.

Electric Circuits and Power Page 706. Ohm’s Law Resistance is equal to the voltage divided by the current. Resistance = Voltage Current Ohms ( ) = Volts.

Electric Circuits Electricity for Refrigeration, Heating and Air Conditioning 7th Edition Chapter 3 Electric Circuits.

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

If you want your boats or anything on your boats, go get them now. Otherwise, just leave them here.

Circuits & Electronics

Electric Circuits with Multiple Loads Some electric devices, such as calculators, simple cameras, and flashlights, operate only one electric load.

Electrical Energy - Moving electrons in a path is electricity

Physics Electric Circuits. –V = I x R –Power (Watts) = I 2 x R = I x V –Series and parallel circuits.

S.MORRIS 2006 ELECTRICAL CIRCUIT CALCULATIONS More free powerpoints at

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.

Current Electricity. Current Electricity is due to a charged electrical particle called an Electron.

Do Now Describe what you think happens electrically when you dim a light.

Circuits, Volts, Amps, and Resistance. Series circuits Simple circuits that have only one path for the current to flow are called series circuits.

Chapter Twenty: Electric Circuits

Lesson 18 Electric Current

ELECTRIC CIRCUITS. I. Circuits A flow of electrons is called a current.  Symbol - I  Unit is Amperes or Amps (A)  I = q/t  Current is amount of charge.

Flashlights & Concepts Demos and Objects Electric circuits

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

Bellringer A standard household outlet has a voltage of what?

1 HVACR216 - Hydronics Basic Circuits and Ohms Law.

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

Chapter 34 and Chapter 35.  Circuit-Pathway for current.

Complex Circuits Notes Series Circuit + Parallel Circuit = Complex Circuit.

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?

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

S.MORRIS 2006 Currents CIRCUITS More free powerpoints at

The Control of Electricity in Circuits

Principles of Electricity Background to electricity, circuits, and how to calculate.

Parallel and Series Circuits 1 1 Definitions Voltage (V) –electric potential, measured in volts (V) Electric Current (I) –a measure of the rate at which.

Electricity Notes 6 - Circuits Electric Circuit – _______________________________________ All electrical circuits have 4 parts: 1.____________________________________________________.

Measuring Voltage and Current Aims Know the units of voltage and current Know how to measure voltage and current.

Current Electricity. Explore how a circuit works Follow the instructions on the handout to investigate how an electrical circuit works. You will find.

Bell Ringer Grab the following  1 wire  1 light bulb  1 battery  Using just this material. Light the light bulb.  Draw what you did.

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

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.

Electric Circuits. Ohm’s Law Current, voltage, and resistance are related to one another. The relationship among resistance, voltage, and current is summed.

+ Electric Circuits Parallel Circuits and Diagrams.

WARM UP 1. In this circuit: a. Where is the voltage? b. Where is the current? c. Where is the resistor? 2. Identify the following circuit symbols: a.a.

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

L 25 Electricity and Magnetism [3]

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

Ch.22-CURRENT ELECTRICITY

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

QQ Two wires of equal length are made from the same material. How is it possible for the wires to have different resistances? If a circuit has a voltage.

Ohm’s Law & Electrical Power

Electric Current Refers to the rate of movement of electric charge (when electrons move from one place to another) Ampere (A) – unit of electric current.

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

Electricity, Sound and Light

Review of Calculations

CURRENT ELECTRICITY.

Physics 3: Electricity and Magnetism

Series and Parallel Circuits

It’s Electrifying! E-Mag.

Unit 2.4 Electric Circuits

ELECTRIC CIRCUITS.

Series Circuit.

Electrons in Circuits. Electrons in Circuits Parts of a circuit Battery Closed switch (allows electrons to flow) Open switch (impedes flow) Wire Resistor.

Physics 3 Electricity and Magnetism

Basic Circuits.

Electric Circuits.

Bell Work: Series vs. Parallel

Current and Ohms law.

Presentation transcript:

Circuits A circuit is any directed path which includes: A starting point (switch,valve..)‏ Power source (battery or outlet) Set pathway defined by a medium (wire, pipes, restrictions)‏ An area of resistance or “load” (light, buzzer, heating element, fan...)‏

I= Q/t Q=charge Key Formulas: t=time V=IR I=current (amps) V=voltage (volts) R=resistance (ohms)

Example 1: What is the resistance of a toaster that draws 12 amps of current from a 120V outlet?

Example 2: How much current(amps) is drawn by a light bulb with a resistance of 100 ohms and 50V of electricity supplied to the circuit?

It is the amount of current in a “shocking” experience that can harm a human!!! 0.001amps = felt 0.005amps = pain 0.010 amps = involuntary muscle spasms 0.015 amps = loss of muscle control 0.70+ = fatality

Food for thought... A dry human body has a resistance of 100,000ohms. What type of damage will a “body” experience if exposed to a standard 120V outlet?

Second thought... A wet body has a resistance of 1000 ohms. What type of damage will occur if a wet body is exposed to a 120V outlet?

Simple circuits contain.... A voltage source 1 direction of wire A volt reader or reactive medium or resistance medium Switch Examples: flashlight, room with one ceiling light, ??? Detecting problems:easy to follow path!!!

Series circuits contain... A voltage source 1 direction of wires Multiple loads Switch EXAMPLES: room with multiple lights which turn on with a single switch, x-mas tree lights, ??? Detecting problems: if 1 medium is broke (open) none of the circuit works.

Parallel circuits contain... A voltage source Multiple directions for current motion Loads Multiple switches EXAMPLE: kitchen with multiple appliances running simultaneously.