AP Physics L09_circuits containing resistors

Slides:

Advertisements

Similar presentations

Kirchoff and the Circuit October 20, Rules for Review Parallel 1/R T = 1/R 1 + 1/R I T = I 1 + I V 1 = V 2 =... Series V T = V 1 +

Advertisements

Group Work 1. Light the bulb!. Electric Current Effects of moving charges.

Unit 7 Parallel Circuits

Physics Mrs. Coyle.  Kirchhoff’s Rules  Series Circuits  Equivalent Resistance  Voltage Drop Across Resistors  Brightness of Bulbs in a Series Circuit.

Light bulb When switch is closed, bulbs are … Brighter The same Dimmer than the bulb above (?)

Kirchhoff’s laws. Kirchhoff’s laws: current law: voltage law: Equations.

DC circuits Physics Department, New York City College of Technology.

Fig 28-CO, p.858. Resistive medium Chapter 28 Direct Current Circuits 28.1 Electromotive “Force” (emf)

Electric current and direct-current circuits A flow of electric charge is called an electric current.

Lecture 2 Basic Circuit Laws

Resistance and Ohm’s Law: More Practice

Y12 Review… Simple circuit…

Series and Parallel Circuits

Series Circuits Circuits in which there is only one path for current to flow through All elements of the circuit (resistors, switches etc…) are in the.

MHS Physics Department AP Unit III C 2 Steady state direct current circuits with batteries and resistors only.

Series and Parallel Circuits How to find the resultant resistance of an electronic circuit.

Kirchhoff’s Law. Kirchoff Laws Kirchhoff's Laws apply the Law of Conservation of Energy and the Law of Conservation of Charge. Kirchhoff's Laws deal with.

AP Physics B Summer Course 年 AP 物理 B 暑假班 M Sittig Ch 21: Circuits.

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.

Introduction To Engineering Electrical Circuits - 2 Agenda Kirchhoff’s Law Resistors & Resistance Wheatstone Bridge.

Circuits and Electronics Midway in Chapter 2 Resistor Combinations.

Electric Circuits.

Aim: How can we explain electrical power and energy? Do Now: Which is brighter: 60 W light bulbs in series or 60 W light bulbs in parallel?

Electrical Energy in Circuits and Conductive material

CH Review Series resistors have the same current; the total voltage is “divided” across the resistors. Parallel resistors have the same voltage;

Which of the circuits shown above are wired in parallel? 1) A only 2) B only 3) C only 4) B and C 5) all of them.

Circuit Rules Electricity Lesson 7. Learning Objectives To know the rules for series and parallel circuits. To know the principle behind these rules.

Series and Parallel Circuits

Determine the mathematical models that capture the behavior of an electrical system 1.Elements making up an electrical system 2.First-principles modeling.

Regents Physics Parallel Circuits –Ohm’s Law in Parallel Circuits.

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.

Kirchhoff’s laws. Apply Kirchhoff’s first and second laws. Calculate the current and voltage for resistor circuits connected in parallel. Calculate the.

What is the equivalent resistance of this circuit? What is the current running through the first resistor? What is the potential difference drop across.

Ohm’s Law Resistance in Series Circuits

Kirchhoff’s Laws Kirchhoff’s Current Law Kirchhoff’s Voltage Law Series Circuits Parallel Circuits Polarity.

Electric Circuits. Electric circuit: a complete path from the positive terminal to the negative terminal.

Electric Circuit Types Series and Parallel Circuits.

DC Circuits AP Physics Chapter 18. DC Circuits 19.1 EMF and Terminal Voltage.

Electric Circuits containing resistors. Circuits Charges travel in a circuit to maintain charge balance.

PHYS219 Fall semester 2014 Lecture 08: Circuits, Fuses and Kirchhoff’s Laws Dimitrios Giannios Purdue University.

Chapter 25 : Electric circuits

Properties of Current Current must flow in a complete circuit - current cannot be “lost” anywhere. Kirchoff’s point rule - the current flowing into any.

The Series Circuit Summary 1. The sum of the _____________or voltage equals the potential rise of the source. 2. The current is ______________ everywhere.

Using IB symbols - sketch a series circuit including

Direct Current Circuits

Kirchhoff’s Rules.

Aim: How do we analyze a parallel circuit?

Kirchoff’s Voltage Law(KVL), first definition:

A B C Which of the circuits shown above are wired in parallel?

Internal Resistance in EMF

Circuits Any complete path along which electrons (charge, current) can flow. Can be arranged in series or in parallel.

Resistors & Capacitors in Series and Parallel

G10 Review… Simple circuit…

So far, we have considered circuits which can be reduced

  emf Chapter 31 – Some Basics of Circuits The Basic things to know:

WELCOME TO PHYSICS PROJECT.

Kirchhoff's Rules.

Kirchoff’s Laws.

Effects of moving charges

Kirchoff’s Laws.

Comparing Series and Parallel Circuits

Parallel Circuits.

SCI 340 L42 current Group Work 1. Light the bulb!

Kirchoff’s Current Law

SCI 340 L43 circuits Group Work

Series and Parallel Circuits

Warm up 2/18 Explain Power What formula do you use to calculate the power used in a circuit? How can you know how much current will flow or how much voltage.

Presentation transcript:

AP Physics L09_circuits containing resistors Electric Circuits containing resistors

Circuits Charges travel in a circuit to maintain charge balance

Resistance Current does not flow unhindered Electrical resistance is analogous to friction or drag Expressed as potential needed to maintain a current

Circuit Diagrams Potential source resistor

Kirchoff’s Laws Current into any node equals current out of the node I1 = I2 + I3 0 = I2 + I3 – I1 “Current law” “Junction law” Conservation of charge

Kirchoff’s Laws Potential drop around any closed loop is zero V1 V – V1 – V2 = 0 V1 + V2 = V V “Voltage law” “Loop law” V2 Conservation of energy

Question: Series Circuit Circuit resistance is A. More than with one bulb. B. Less than with one bulb. C. The same as with one bulb.

Series Circuit R1 R2 R3 Circuit resistance = R1 + R2 + R3

Series Summary The same current flows through all resistors in series. The series resistance is the sum of the resistors’ resistances. The resistors’ voltage drops add up to the series total. The voltage drop across a resistor is proportional to its resistance.

Question: Parallel Circuit Circuit resistance is A. More than with one bulb. B. Less than with one bulb. C. The same as with one bulb.

Parallel Circuit Diagram

Potential Differences

Currents Total current = I = I1 + I2 + I3 = V/R1 + V/R2 + V/R3 Circuit resistance =V/I = 1/R1 + 1/R2 + 1/R3 1

Parallel Summary The same voltage drops across all resistors in parallel. The series current is the sum of the resistors’ currents. The effective resistance is less than for any individual resistor. Formula is R =

Series and Parallel Circuit 1/R2 + 1/R3 1 Circuit resistance = R1 +

Group Work Determine current direction, current, voltage, and power dissipated for each resistor. 12 W 6 W 9 W 8 W 10 W 3 W 18 W 9 W 9 W 18 W

Group Work Determine the power for each resistor. 12 W 6 W 9 W 8 W

Using Kirchoff’s Rules Make as many loop equations as there are unique loops. Make as many node equations as there are branches. The number of equations may depend on how much cleaning up you do beforehand.

Kirchoff’s Rules