Packet #4 - NNHS Tigerscience

Transcription

Name:______________________________________________ Block: ___________ Date: _______________
NNHS Introductory Physics: MCAS Review Packet #4
Introductory Physics, High School
Learning Standards for a Full First-Year Course
I. CONTENT STANDARDS
5. Electromagnetism
Central Concept: Stationary and moving charged particles result in the phenomena known as electricity
and magnetism.
5.1 Recognize that an electric charge tends to be static on insulators and can move on and in
conductors. Explain that energy can produce a separation of charges.
5.2 Develop qualitative and quantitative understandings of current, voltage, resistance, and the
connections among them (Ohm’s law).
5.3 Analyze simple arrangements of electrical components in both series and parallel circuits.
Recognize symbols and understand the functions of common circuit elements (battery,
connecting wire, switch, fuse, resistance) in a schematic diagram.
5.4 Describe conceptually the attractive or repulsive forces between objects relative to their charges
and the distance between them (Coulomb’s law).
5.5 Explain how electric current is a flow of charge caused by a potential difference (voltage), and
how power is equal to current multiplied by voltage.
5.6 Recognize that moving electric charges produce magnetic forces and moving magnets produce
electric forces. Recognize that the interplay of electric and magnetic forces is the basis for electric
motors, generators, and other technologies.
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
Central Concept: Stationary and moving charged particles result in the phenomena known as
electricity and magnetism.
1.) The diagram below shows two aluminum
2.) Why does a plastic rod have a negative
spheres.
charge after being rubbed with a piece of fur?
A. The fur gives up protons to the rod.
B. The rod gives up electrons to the air.
C. The fur gains protons from the rod.
D. The rod gains electrons from the fur.
Aluminum sphere A contains a small negative
charge and is touched by aluminum sphere B,
which has a larger negative charge. Which of
the following occurs next?
A. Protons flow from sphere B to sphere A.
B. Protons flow from sphere A to sphere B.
C. Electrons flow from sphere B to sphere A.
D. Electrons flow from sphere A to sphere B.
My Answer and Explanation:
Correct Answer and Explanation:
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
Central Concept: Stationary and moving charged particles result in the phenomena known as electricity and
magnetism.
3.) A negatively charged rubber rod was
brought near some small pieces of paper. The
rod’s charges repelled the negative charges in
the pieces.
Which of the following caused the repulsion of
the negative charges?
A. conduction
B. gravitation
C. induction
D. insulation
4.) The figure below shows a neutral glass rod
and a positively charged metal sphere.
Which of the following best describes the
movement of charges as this glass rod touches
the sphere?
A. Negative charges move from the sphere to
the glass rod.
B. Negative charges move from the glass rod
to the sphere.
C. Positive charges move from the sphere to
the glass rod.
D. Positive charges move from the glass rod to
the sphere.
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
5.) Which of the following describes an object
that must have a net negative charge?
A. It contains more molecules than atoms.
B. It contains more electrons than protons.
C. It is carrying an electric current.
D. It is made of metal.
6.) An electric circuit is shown below. The
accompanying table shows the current
measured at different levels of resistance.
Based on the data shown in the table, what is
the voltage drop across the variable resistor?
A. 1.5 V
B. 6 V
C. 9 V
D. 12 V
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
7.) Mr. Jenkins constructed a circuit consisting 8.) What is the voltage in a circuit with a
of a variable source, wires, and a resistor. In
current of 3 Amps and a total resistance of 12
order to triple the amount of current, how
Ω?
should he change the voltage of the source?
A. 0.25 V
A. make the voltage three times larger
B. 4 V
B. make the voltage one-third as great
C. 15 V
C. make the voltage nine times larger
D. 36 V
D. make the voltage one-ninth as great
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
9.) The circuit diagram below shows three
10.) Students in a physics lab are studying the
resistors, an ammeter, and a battery.
circuit shown in the diagram below.
How much current flows through the ammeter?
A. 1.0 A
Which of the following options will
B. 6.0 A
double the current through the ammeter?
C. 13.0 A
A. replacing the battery with a 5 V battery
D. 24.0
B. adding a 30 Ω resistor in parallel with R
C. replacing the resistor with a 30 Ω resistor
D. adding a second 60 Ω resistor in series with
R
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
11.) A 72 W navigation unit on a commercial
12.) When a light bulb is turned on, energy
aircraft has a 24 V power supply and uses 3 A changes from one form to another. Which of
of electric current. What is the electrical
the following best describes this change?
resistance of the navigation unit?
A. sound energy to light energy
B. nuclear energy to light energy
A. 4 Ω
C. electrical energy to light energy
B. 8 Ω
D. magnetic energy to light energy
C. 13 Ω
D. 22 Ω
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
14.) An ammeter measures the current in the
13.) Marta has a radio in her room. It requires
circuit shown below.
electricity in order to play. Which of the
following is necessary in order for electricity to
move from the source to the radio?
A. a circuit
B. a magnet
C. a light bulb
D. an insulator decreasing in volume.
When the piece of wire labeled X is replaced
by a second identical R, which of the following
happens to the current?
A. It increases.
B. It decreases.
C. It goes to zero.
D. It remains unchanged.
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
15.) A student combs her hair with a hard
rubber comb and then hangs the comb on a
loop of light thread that is suspended from a
hook as shown below.
She immediately combs her hair with a second
identical comb and hangs it on the second
suspended loop of light thread. If the combing
has caused a charge to accumulate on the
combs, which of the following shows what will
occur?
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
16.) The figures below show a light bulb connected to a battery in two different ways.
When the switch in Figure 1 is closed the bulb will light. A plastic ring is inserted in the circuit as
shown in Figure 2. What will happen when the switch is closed in Figure 2?
A. The bulb will light just as it did in Figure 1.
B. The bulb will be brighter than it was in Figure 1.
C. The bulb will light, but will be less bright than it was in Figure 1.
D. The bulb will not light at all.
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
17.)
A student is testing materials to see if
they conduct electricity. The student
places each item shown at position X,
making sure the object is in contact
with the loose end of each wire. Which
item will electricity flow through,
causing the bulb to light?
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
18.) In the diagram below, the circuit has one
19.) A teenager removes the plastic wrapping
battery and two identical light bulbs.
from a CD. The pieces of wrap cling to her
hand.
Which of the following forces causes the wrap
to cling to her hand?
A. electrostatic
B. gravitational
C. magnetic
D. net
If one light bulb is removed, which of the
following could replace it so that the remaining
light bulb is dimmer?
A.
B.
C.
D.
Name:______________________________________________ Block: ___________ Date: _______________
5. Electromagnetism
20.) The distance between two charges is
21.) A magnetic compass is placed near an
represented by d. In which of the following
insulated copper wire. When the wire is
diagrams is the attractive force between the two
connected to a battery, the compass needle
charges the greatest?
changes position.
Which of the following is the best
explanation for the movement of the
needle?
A.
A. The copper wire magnetizes the needle
to create a force.
B. The needle magnetizes the copper wire
to create a force.
B.
C. The current in the wire produces a
C.
magnetic field and exerts a force on the
needle.
D. The insulation on the wire becomes
energized and exerts a force on the needle.
D.
Name:______________________________________________ Block: ___________ Date: _______________
Practice: Open-response question #1
BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION.
Show all your work (diagrams, tables, or computations)
If you do the work in your head, explain in writing how you did the work.
Look at the objects shown below.
Some of these objects are conductors of electricity and some are insulators.
a. List all the objects that are conductors.
b. List all the objects that are insulators.
c. Describe the difference between a conductor of electricity and an insulator of electricity.
Name:______________________________________________ Block: ___________ Date: _______________
Practice: Open-response question #2
BE SURE TO ANSWER AND LABEL ALL PARTS OF THE QUESTION.
Show all your work (diagrams, tables, or computations)
If you do the work in your head, explain in writing how you did the work.
A circuit with three identical light bulbs is shown in the diagram below.
a. Identify the symbol labeled J in the circuit.
b. Describe what each light bulb does in each of the following situations:
• when switches 1 and 2 are open
• when switches 1 and 2 are closed
• when switch 1 is open and switch 2 is closed
• when switch 1 is closed and switch 2 is open

Packet #4 - NNHS Tigerscience

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