Friday, February 28, 2014

Electric Circuits & Ohms Law

***** FREE RESOURCE--->5Easy Steps to Get A 5 on the AP Physics Exam

After studying the material of this chapter, the student should be able to:
1. Explain how a simple battery can produce an electrical current.
2. Define current, ampere, emf, voltage, resistance, resistivity, and temperature coefficient of resistance.
4. Distinguish between a) conventional current and electron current and b) direct current and alternating current.
5. Know the symbols used to represent a source of emf, resistor, voltmeter, and ammeter and how to interpret a simple circuit diagram.
6. Given the length, cross sectional area, resistivity, and temperature coefficient of resistance, determine a wire's resistance at room temperature and some higher or lower temperature.
7. Solve simple dc circuit problems using Ohm's law.
8. Use the equations for electric power to determine the power and energy dissipated in a resistor and calculate the cost of this energy to the consumer.

1. Determine the equivalent resistance of resistors arranged in series or in parallel or the equivalent resistance of a series parallel combination.
2. Use Ohm's law and Kirchhoff's rules to determine the current through each resistor and the voltage drop across each resistor in a single loop or multiloop dc circuit.
3. Distinguish between the emf and the terminal voltage of a battery and calculate the terminal voltage given the emf, internal resistance of the battery, and external resistance in the circuit.
4. Determine the equivalent capacitance of capacitors arranged in series or in parallel or the equivalent capacitance of a series parallel combination.
5. Determine the charge on each capacitor and the voltage drop across each capacitor in a circuit where capacitors are arranged in series, parallel, or a series parallel combination.
6. Calculate the time constant of an RC circuit.

Day 67
Introduction to Basic Circuits & Diagrams.
Notes: Circuit Symbology
Drawing Circuit Diagram

Battery Voltage Source
Wires
Resistors and Bulbs
Switches

Day 68
Ohm's Law Lab

Day 69

Ohm's Law

Conclusions

Day 70

Easter Bunny Rules

Recitation Circuits WS

HW complete circuits WS

Practice Quiz:

http://www.indiabix.com/electronics/series-circuits/Objectives

Day 71

Circuits Quest con Queso

Day 72

Hotdog Hotdog hot digity dog

Magnetic Fields Continued

Day 60
Practice of RHR and its applications of right hand rule
Online practice questions
http://www.allenisd.org/cms/lib/TX01001197/Centricity/Domain/1840/Magnetism/Hot%20Potato%20Magnetism%20Graphics/Right_hand_rule_practice_1_jb.htm

Day 61
Forces between current carrying wire notes diagrams and discussion
Yamato 1 magnetohydrodrive-> notes and discussion
http://en.wikipedia.org/wiki/Magnetohydrodynamic_drive

Day 62
Induced EMF
As it pertains to RHR. Wire sections and loops entering magnetic fields
3 cases will be discussed and students will simplify analyze and apply RHR to and between case to explain the resulting current of a wire in a magnetic field.

Day 63
Quest on the direction and application of the RHR " Macarena effect quiz"
Worlds simplistic motor student will set up and observe the operation of a simple motor consisting of a coil a battery and a magnet.
Students will make observations
Explain the purpose for each component and step in order to produce the desired effect
Relate back to RHR

Day 64
Summarize key ideas to date-
Discussion and Summary of key concepts of simple electric motor.
Phase/ flux/ RHR will be explained in context. The ultimate goals is to provide the construct example for the functionality of emf to be used in future study of rail guns and emf.
Notes mass spectrograph-
AP2000 b7 student will analyze and explain both qualitatively and quantitatively the function of the device.

Day 65
Choose Any 2 EMAG problems form the AP EXAMS
Develop Solutions and Solve.

Day66
WhiteBoard of problems from previous day.

Day 67
Intorduction to Basic Circuits & Diagrams.
Battery Voltage SOurce
Wires
Resistors and Bulbs
Switches

Saturday, February 22, 2014

Centripetal Force & Gravitation

OK. So if you check the blog and you are able to finish your calculation of the mass of the sun, you only need to do 2 other problems from the ws. not the entire thing.
How do you know what the correct answers is ? Easy ~2X10^30Kg
Here is a link to the text if you need help "CICK HERE"

Centrifugal Force

1. Calculate the centripetal acceleration of a point mass in uniform circular motion given the radius of the circle and either the linear speed or the period of the motion.
2. Identify the force that is the cause of the centripetal acceleration and determine the direction of the acceleration vector.
3. Use Newton's laws of motion and the concept of centripetal acceleration to solve word problems.
4. Distinguish between centripetal acceleration and tangential acceleration.
5. State the relationship between the period of the motion and the frequency of rotation and express this relationship using a mathematical equation.
6. Write the equation for Newton's universal law of gravitation and explain the meaning of each symbol in the equation.
7. Determine the magnitude and direction of the gravitational field strength (g) at a distance r from a body of mass m.
8. Use Newton's second law of motion, the universal law of gravitation, and the concept of centripetal acceleration to solve problems involving the orbital motion of satellites.
9. Explain the "apparent" weightlessness of an astronaut in orbit.
10. State from memory Kepler's laws of planetary motion. NOT! Derive ideas and formulas based on DUMB IDEAS Like Fnet=Fc=FG
11. Use Kepler's third law to solve word problems involving planetary motion.
12. Use Newton's second law of motion, the universal law of gravitation, and the concept of centripetal acceleration to derive Kepler's third law.
13. Solve word problems related to Kepler's third law.
14. Identify the four forces that exist in nature. ALL DAY EVERY DAY

Practice PROBLEMS WS 7H

Monday, February 10, 2014

Magnetism

Every AP Magnetism Problem to Date

Objectives

After studying the material of this chapter, the student should be able to:
1. Draw the magnetic field pattern produced by iron filings sprinkled on paper placed over different arrangements of bar magnets.
2. Determine the magnitude of the magnetic field produced by both a long straight current-carrying wire and a current loop. Use the right hand rule to determine the direction of the magnetic field produced by the current.
3. Explain what is meant by ferromagnetism, including the concept of domains and the *Curie temperature.
4. State the conventions adopted to represent the direction of a magnetic field, the current in a current-carrying wire and the direction of motion of a charged particle moving through a magnetic field.
5. Apply the right hand rule to determine the direction of the force on either a charged particle traveling through a magnetic field or a current-carrying wire placed in a magnetic field.
6. Determine the torque on a current loop arranged in a magnetic field and explain galvanometer movement.
7. Explain how a mass spectrograph can be used to determine the mass of an ion and how it can be used to separate isotopes of the same element.

Day 56
Electormagnetism:
SS:5.1
Coil Compass Battery & Wire Ohm my!

Investigate and make/write observations about interactions between the components.

model simplification ex. Milikan oil drop

Day 57

Complete & Discuss Results From investigation

Summarize observations Diagrams
Notes

Day 58

Return Potential Potential Difference Quest discuss and revise errors in reasoning

Day 59

Introduction to the Right Hand Rule and Force

*Every AP Magnetism Problem to Date

Wednesday, February 5, 2014

Phershman PHYSICS

2/22/14
Some people asked about reading Motion Maps

How to Read a Motion Map ClickHere
Key Ideas for Motion Postion vs. time

KEY IDEAS

2/7/14 HW WS Click Here! Complete 4&5 you may discuss
Objectives:

Honors Physics

Constant Velocity Particle Model
1.1 A CVPM I know the difference between vector and scalar quantities.
1.2 A CVPM I know the difference between position, distance, and displacement.
1.3 A CVPM I can interpret/draw motion maps for objects moving with constant velocity.
1.4 A CVPM I can interpret/draw the position vs. time graph for an object moving with constant velocity.
1.5 A CVPM I can interpret/draw the velocity vs. time graph for an object moving with constant velocity.
1.6 B CVPM I can draw the corresponding position-vs-time graph given a velocity-vs-time graph.
1.7 B CVPM I can solve problems involving average speed and average velocity.

Watch Video
Draw a motion map for both the squirrel and man.
Sketch a graph of their motions be sure to include all key points.

Sunday, February 2, 2014

Electric Potential and Potential Difference

"Voltage"

State Standard 5.2 A-E

Objectives

After studying the material of this chapter, the student should be able to:
1. Write from memory the definitions of electric potential, and electric potential difference.
2. Distinguish between electric potential, electric potential energy, and electric potential difference.
3. Draw the electric field pattern and equipotential line pattern which exist between charged objects.
4. Determine the magnitude of the potential at a point a known distance from a point charge or an arrangement of point charges.
5. State the relationship between electric potential and electric field and determine the potential difference between two points a fixed distance apart in a region where the electric field is uniform.
6. Determine the kinetic energy in both joules and electron volts of a charged particle which is accelerated through a given potential difference.
7. Explain what is meant by an electric dipole and determine the magnitude of the electric dipole moment between two point charges.
8. Given the dimensions, distance between the plates, and the dielectric constant of the material between the plates, determine the magnitude of the capacitance of a parallel plate capacitor.
9. Given the capacitance, the dielectric constant, and either the potential difference or the charge stored on the plates of a parallel plate capacitor, determine the energy and the energy density stored in the capacitor.

Day 53

1985 B2 Complete Practice Problem after derivation of V=kq/r

magnetic abstraction to help answer e.

students hold one magnet and move other in the field make analogies between the 2 situations

Group Work Graded assignment 1989 #2
HW:

Day 54

White Board & Discuss Previous HW

Day 55 Test Fields Potential and Review Question

Print and use for test

Electromagnetic Induction
State Standard 5.2 A-E
Student Learning Objectives

To observe the experimental evidence for electromagnetic induction.
To understand the circumstances under which changing magnetic fields lead to induced currents.
To understand how the movement of a conductor through a magnetic field leads to a motional emf.
To understand and use Lenz’s law for induced currents.
To use Lenz’s law and Faraday’s law to determine the direction and size of induced currents.
To understand basic applications of electromagnetic induction to technology.

Day 56

Introduction to Electromagnetic Induction

Discovery Experimentation activity

9v Battery/compass/ coil of wire
Identify variables and qualitative interactions
Defn relationships and quantities
relate equations

sample problem full abstraction
HW: Read Electromagnetic Induction