Resistance (of a wire) Where R is resistance in Ohms, L the length, and A the cross sectional area.

Slides:

Advertisements

Similar presentations

Physics January

Advertisements

Diagramming circuits. Ohm’s Law Mnemonic Definitions Current: the number of electrons that go through a wire in one second Voltage: the pressure that.

Review An electric circuit is composed of what 3 elements? Conductor, potential difference, closed loop What are the units of voltage? Joules / Coulomb.

Factors Affecting Resistance

Electric currents Chapter 18. Electric Battery Made of two or more plates or rods called electrodes. – Electrodes are made of dissimilar metals Electrodes.

…the movement of charge between varying locations and the corresponding loss and gain of energy which accompanies this movement. Unit 4 - Electric Circuits…

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.

CLASS :- X MADE BY :- MANAS MAHAJAN

Concept Summary Batesville High School Physics. Potential Difference  Charges can “lose” potential energy by moving from a location at high potential.

Current Electricity, Ohm’s Law & Circuits. Current (I) The rate of flow of charges through a conductor Needs a complete closed conducting path to flow.

Resistance in Electrical Systems

Circuits & Electronics

Potential Difference (V) Charge flows from higher potential to lower potential until electric potential equilibrium is reached. When electric potential.

Physics 4.4. Charge  What is charge?  Where do you see charge around you?  Describe the atom in terms of charge?

4.3 Notes Resistance in Electrical Systems. Properties of Materials Conductors Have a large ability to conduct electric current They contain many free.

Electric Current & Electricity Calculations

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

Waves: Take 2 Mr. Davis. p ,5,20,32,33,38,40,43,45.

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

Electrical Current Mr. Fleming.

Current Electricity. How is current produced? When a high potential is connected by a conductive material to a low potential. When a high potential is.

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

CLASS :- X MADE BY :- MANAS MAHAJAN SCHOOL :- K.V. GANESHKHIND PUNE-7

SPH3U Electricity & Circuits

Inverse square law If you double the distance, the effect diminishes by 4 (2 squared) If you triple the distance, the effect diminishes by 9 (3 squared)

Lesson Measuring and Calculating Electricity. Interest Approach § Have you or your parents ever been using several appliances in the kitchen and had a.

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

Ohm’s Law Physics 102 Professor Lee Carkner Lecture 13.

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

Current Resistance Electric Power & Energy. Voltage (V) Electric potential difference between 2 points on a conductor Sometimes described as “electric.

1 Conductor and Insulator Warm up Will the light bulb light up if the following items are put into the electric circuit? Predict Yes or No. 1. Plastic.

Circuits. Reviewing terms Circuits need 3 basic parts: An Energy Source Load (Power demand) Wires.

Current Electricity, Ohm’s Law & Circuits. Current (I) The rate of flow of charges through a conductor Needs a complete closed conducting path to flow.

PV System Design and Installation LO3 Electricity Basics.

Voltage current resistance All Scalar quantities.

Reformatted for Powerpoint by Megan Maller

12 Ω 11Ω 3 24 Ω 4 Ω Ω 17 Ω 6 Ω 4 Ω 2 RT = = 33 Ω.

Ch.22-CURRENT ELECTRICITY

(Answers on final slide)

Electric Current and Resistance

through a conducting metal

Circuit Diagrams Circuit diagrams use symbols to represent the different components of an electric circuit The most common components of simple electric.

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.

Waves: Intro Periodoic motion.

Current Electricity.

Foundations of Physical Science

Series and Parallel Circuits

Foundations of Physics

20.1 Series and Parallel Circuits

Chp Properties of Mechanical Waves

5.1 : ELECTRICAL DISTRIBUTION

Review of Calculations

Resistance in Circuits

Resistance Resistance Loads Conductors Superconductors Ohm’s Law

Current Electricity and Circuits

THIS IS JEOPARDY. THIS IS JEOPARDY With Your Host... Ms. Allen.

Direct Current Circuits

Series and Parallel Circuits

Current Directions and

Electric Current.

Comparing Series and Parallel Circuits

Ch Electricity II. Electric Current (p ) Circuit

Electrical current is measured in which of the following units?

CIRCUITS Current Resistance Ohms Law Power Series Circuits

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.

Current and Simple Circuits Voltage Resistance Safety

Presentation transcript:

Resistance (of a wire) Where R is resistance in Ohms, L the length, and A the cross sectional area

Diagramming circuits

Ohm’s Law Mnemonic P = IV where 1000W = 1kiloWatt 1kW * 1 hour = 1kWh The cost of 1 kWh is $0.134 in this area. kW * hours * $/kWh = Cost for one hour of operation P = IV where P = Power (in Watts, the rate at which energy is consumed) I = Current V = Voltage Typical household voltage is 120V.

Important equations for Electricity Series Circuits VT = V1 + V2 + V3 + … V = Voltage (Volts) I = Current (Amps) R = Resistance (Ohms) RT = R1 + R2 + R3 + … IT = I1 = I2 = I3 = … In a series electric circuit all of the electrons must flow through the same elements. In a series circuit each resistor adds to the total resistance. In a parallel electric circuit electrons may flow through different circuit elements. In a parallel circuit each resistor provides another way for electrons to flow. Parallel Circuits VT = V1 = V2 = V3 = … RT < R1, R2, R3, … IT = I1 + I2 + I3 + …

Tell me about heart bypassess…

A V V V V A V V A V V Series Circuit I4 = VT = V1 + V2 + V3 + … R7 = RT = R1 + R2 + R3 + … + R8 = 2 V6 = V8 = V V A I5 = V9 = 5 R9 = IT = I1 = I2 = I3 = … V V A I6 = R10 = 4 V V V10 =4

V V A Parallel Circuit R1 = 100 Ohms VT = 120V R2 = 200 Ohms V1 = R3 = RT = V3 = V2, I2 V3, I3 V V R1 V1, I1 R2 R3 A IT IT = I1 = I2 = I3 = 0.8A

KWH Utility $/kWh CH $0.134 Cost / day = kW * Hours/day * $/kWh Item Watts kW (1000W) Current Hours/day Cost / day Cost / year Total P = IV where P is power in Watts, I is current (in Amps), and V is voltage. Assume V = 120V

Ideal Gas Law: PV = nRT As pressure increases … As the number of atoms increases … As the temperature increases … As the volume changes … http://phet.colorado.edu/en/simulation/gas-properties

Pendular Motion The period of the simple pendulum is given by Where T is the period, L is the length of the pendulum, and g is the acceleration due to gravity. T is a function of length. It has a weak dependence on the angular displacement and should not be affected by the mass.

Review: Key characteristics of waves Amplitude: The height of the wave from node to antinode (transverse waves), or the distance between compression and rarefaction in a in a compressive wave. Measured in units describing the wave Wavelength: The distance traversed by a full cycle of the wave Node: The “zero point” of the wave Antinode: The extreme point of the wave (max or min amplitude) Period: The time between successive waves Frequency: The rate of occurrence of the wave (in Hertz or cycles / second) Antinode Node Amplitude Wavelength

Speed of Waves The relationship between wave speed, wavelength, and frequency is simple For a given temperature, pressure, material, etc. v = fl, where v is the speed, f is the frequency, and lambda is the wavelength.