Download essential unit 4 (e04)

AP PHYSICS 2
(SECONDARY)
ESSENTIAL UNIT 4 (E04)
(Electric Current)
(July 2016)
Unit Statement: In this unit, students will continue their study of electricity as charges flow
through circuits. They will study the relationships between power, current, potential
difference, resistance, and capacitance. Students will use conservation principles to predict
behavior within a circuit. (Estimated class time three weeks)
Essential Outcomes: (these must be assessed for mastery)
1. The Student Will choose and justify the selection of data needed to determine
resistivity for a given material. [LO 1.E.2.1, SP 4.1]
2. TSW make and justify a quantitative or qualitative prediction of the effect of a change
in values or arrangements of one or two circuit elements on the currents and potential
differences in a circuit containing a small number of sources of emf, resistors,
capacitors, and switches in series and/or parallel. [LO 4.E.5.1, LO 4.E.5.2, SP 2.2, SP
6.1, SP 6.4]
3. TSW plan data collection strategies and perform data analysis to examine the values
of currents and potential differences in an electric circuit that is modified by changing
or rearranging circuit elements, including sources of emf, resistors, and capacitors.
[LO 4.E.5.3, SP 2.2, SP 4.2, SP 5.1]
4. TSW analyze data to determine the effect of changing the geometry and/or materials
on the resistance or capacitance of a circuit element and relate results to the basic
properties of resistors and capacitors. [LO 4.E.4.3, SP 5.1]
5. TSW use conservation of energy principles (Kirchhoff’s loop rule) to describe and
make predictions regarding electrical potential difference, charge, and current in
steady-state circuits composed of various combinations of resistors and capacitors.
[LO 5.B.9.5, SP 6.4]
6. TSW determine missing values and direction of electric current, and when
appropriate, charge of capacitors at steady state and potential differences, in various
branches of a circuit through appropriate selection of nodes and application of the
junction rule. [LO 5.C.3.5, LO 5.C.3.6, LO 5.C.3.7, SP 1.4, SP 2.2]
7. TSW solve problems involving the relationships between power, voltage, energy and
current. [SP 2.2]
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Introduced and Practiced Outcomes:
1. TSW answer AP style multiple choice questions that pertain to concepts in this unit.
2. TSW answer AP style free response questions including experimental design,
quantitative/qualitative translation, and a paragraph-length argument.
Guided or Essential Questions:
 What factors affect the resistance of a material?
 How do charge conservation and energy conservation apply to direct current
circuits?
 What is common to elements in series and parallel circuits?
 How do capacitors affect current in a circuit immediately after a switch is closed,
as well as under steady-state conditions?
Key Concepts:
 Electric Current
 Ohm’s Law: Resistance and Resistors
 Resistivity
 Capacitance
 Storage of Electric Energy
 Electric Power
 Resistors in Series and Parallel
 Kirchhoff’s Rules
 RC Circuits (steady state only)
Common Equations for this Unit:
Charged Capacitor
Electric Current
Resistance
Electric Power
Ohm’s Law
Resistance in Series
Resistance in Parallel
Capacitance in Parallel
Capacitance in Series
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Schedule of Suggested Laboratory experiments (guided inquiry format is suggested for the
labs shaded in gray)
Unit # Lab Name of Laboratory
Description of Lab
Associated
#
Science
Practices
Students use Vernier circuit board to
4
18 Ohm’s Law Lab
5.1, 6.3
explore the relationship between current
potential difference, and resistance in a
simple circuit.
Students use various shapes of Play-doh to
4
19 Resistivity Lab
1.1, 4.1, 4.3,
investigate resistivity.
6.2, 7.1
4
4
4
20
21
22
Build a Circuit: Phet
Vernier Circuit Intro
Series and Parallel
Circuits
4
4
4
4
23
24
25
26
RC Circuits
Phet Capacitor Lab
DC Challenge
Kirchhoff’s Junction
Rule
Students use the Phet: CCK to design
circuits according to circuit diagrams.
1.1, 1.2, 4.2,
Students learn to set up circuits according
to circuit diagrams and measure current,
potential difference, resistance on the given
circuits.
Students use Phet: Circuit Construction Kit
(CCK) to explore the difference between
resistors connected in series and parallel
circuits.
AP Physics 2 Investigation 3 (College
Board) Students investigate RC circuits to
observe and analyze relationships that exist
for different configurations between
resistors, capacitors and emf sources.
Students use various plate separations on
the simulation and measure capacitance.
Through graphing, the students discover the
relationship between these two quantities.
Students build circuits using Phet: CCK to
produce desired results.
1.1, 1.2, 4.2,
Students build circuits with battery and
resistors in various configurations.
Measuring currents they discover or
validate Kirchhoff’s Junction Rule.
1.4, 2.2, 6.4,
4.3,
4.3,
1.1, 1.2, 4.2,
4.3,
1.4,2.2, 4.2,
4.3, 5.1, 6.1,
6.4
1.4, 2.2, 4.3,
6.1, 6.4, 7.2
1.1, 1.2, 4.2,
4.3,
7.2,
Suggested Materials:
Textbook (required):
 Giancoli, D.C. Physics: Principles with Applications. Englewood Cliffs, NJ: Pearson
Education. (Chapters 17:7, 18:1 – 5, 19:1 – 6)
Laboratory Texts (required)
 Puri, O; Zober, P. Physics. A laboratory manual; Boston, Mass. N.Y: Pearson Custom
Pub., 2002. 8th edition
 Appel, K, Ballen, C, Gastineau, J, Vernier, D. Physics with Vernier. Beaverton, OR;
Vernier Software and Technology, 2010. (only need one copy for teacher)
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
AP Physics 1 and 2 Inquiry-Based Lab Investigations: A Teacher’s Manual
Investigation 3
Supplemental Materials: (Optional, but purchase of a single copy of each is highly
recommended)
 O’Kuma, Thomas L., Maloney, D. Hieggelke. Ranking Tasking exercises in Physics.
Boston: Addison-Wesley Publishing, 2004
 Dukerich. Advanced Physics with Vernier – Beyond Mechanics. Beaverton, OR;
Vernier Software and Technology, 2012.
Suggested Technology Resources:
Labs, in-class activities, videos, demos:
https://phet.colorado.edu/en/simulation/legacy/circuit-construction-kit-ac The Phet: Circuit
Construction Kit is used for several labs. Follow the Teacher link for the various activities.
http://physics.mercer.edu/labs/manuals/manualEMlab/Resistivity.pdf This document can be
used for the Resisitivity Lab.
RUBRIC FOUND ON FOLLOWING PAGE……………………………
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Suggested Unit Evaluation Rubric- AP PHYSICS 2- E04
Name: ____________________________________ Date: _______________________
• To receive a ‘B’, the student must show ‘B’ level mastery on all essential outcomes
(TSW’s).
• The teacher’s discretion on the student’s holistic performance on the unit, including such
items as: the above ‘A’ level rubric, the unit project, group work and class discussions will
determine ‘A’ level mastery.
The Student Will
‘A’ LEVEL
‘B’ LEVEL
1. TSW make predictions about
the properties of resistors
and/or capacitors when
placed in a simple circuit,
based on the geometry of the
circuit element and supported
by scientific theories and
mathematical relationships.
[LO 4.E.4.1]
2. TSW make and justify a
quantitative or qualitative
prediction of the effect of a
change in values or
arrangements of one or two
circuit elements on the
currents and potential
differences in a circuit
containing a small number of
sources of emf, resistors,
capacitors, and switches in
series and/or parallel.
[LO 4.E.5.1, LO 4.E.5.2]
3. TSW plan data collection
strategies and perform data
analysis to examine the
values of currents and
potential differences in an
electric circuit that is
modified by changing or
rearranging circuit elements,
including sources of emf,
resistors, and capacitors.
[LO 4.E.5.3]
I can support predictions
of resistor and capacitor
properties using scientific
theories and mathematical
relationships.
I can predict the
properties of resistors
and/or capacitors when
placed in a simple circuit,
based on the geometry of
the circuit element.
I can justify predictions
of current and potential
differences in a circuit
using scientific principles.
I can predict the effect of
a change in values or
arrangements of one or
two circuit elements on
the currents and potential
differences in a circuit
containing a small
number of sources of emf,
resistors, capacitors, and
switches in series and/or
parallel.
I can perform data
analysis to examine the
values of currents and
potential differences in an
electric circuit that is
modified by changing or
rearranging circuit
elements, including
sources of emf, resistors,
and capacitors
I can plan data collection
strategies to examine the
values of currents and
potential differences in an
electric circuit that is
modified by changing or
rearranging circuit
elements, including
sources of emf, resistors,
and capacitors.
4. The Student Will translate
between graphical and
symbolic representations of
experimental data describing
relationships among power,
current, and potential
difference across a resistor.
[LO 5.B.9.8]
I can translate a graphical
representation into
symbolic form verifying
relationships among
power, current and
potential difference across
a resistor.
I can produce a graphical
representation of
experimental data
describing relationships
among power, current,
and potential difference
across a resistor.
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QSI AP PHYSICS 2 SEC E04
Copyright © 1988-2016
Comments
5. TSW use conservation of
energy principles
(Kirchhoff’s loop rule) to
describe and make
predictions regarding
electrical potential
difference, charge, and
current in steady-state
circuits composed of various
combinations of resistors and
capacitors. [LO 5.B.9.5]
6. TSW determine missing
values and direction of
electric current, and when
appropriate, charge of
capacitors at steady state and
potential differences, in
various branches of a circuit
through appropriate selection
of nodes and application of
the junction rule.
[LO 5.C.3.5, LO 5.C.3.6,
LO 5.C.3.7]
7. TSW solve problems
involving the relationships
between power, voltage,
energy and current.
I can explain how to
change a circuit that will
result in a desired current
or potential difference.
I can set up appropriate
equations to describe and
make predictions of
electrical potential
difference charge, and
current in steady-state
circuits composed of
various combinations of
resistors and capacitors.
I can determine missing
values of charge of
capacitors at steady state
and potential differences,
in various branches of a
circuit through
appropriate selection of
nodes and application of
the junction rule.
I can determine missing
values and direction of
electric current in various
branches of a circuit
through appropriate
selection of nodes and
application of the junction
rule.
I can solve problems
involving more than one
relationship between
power, voltage, energy,
and current.
I can solve problems
involving the
relationships between
power, voltage, energy
and current.
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QSI AP PHYSICS 2 SEC E04
Copyright © 1988-2016