drumheller valley secondary school unit two dip… · web viewunit two forces and fields review...
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Unit Two Forces and Fields Review
B1.1k explain electrical interactions in terms of the law of conservation of charge
B1.2k explain electrical interactions in terms of the repulsion and attraction of charges
B1.3k compare the methods of transferring charge (conduction and induction)
Use the following information to answer the next question
1. As a result of the procedure described above, the metal rod will
A. be neutral
B. have a net charge of zero
C. have a positive net charge
D. have a negative net charge
______________________________
Use the following information to answer the next question.
2. Which of the following rows indicates the final charge present on each sphere?
Row Sphere K Sphere L Sphere MA. 0 0 0B. -x -x +2x
C.+ x2 -x
+ x2
D.+ x2
−x4
−x4
B1.4k explain, qualitatively, the distribution of charge on the surfaces of conductors and insulators
B1.5k explain, qualitatively, the principles pertinent to Coulomb's torsion balance experiment
B1.6k apply Coulomb's law, quantitatively, to analyze the interaction of two point charges
B1.7k determine, quantitatively, the magnitude and direction of the electric force on a point charge due to two or more other point charges in a plane
Use the following information to answer the next two questions.
3. The direction of the net electric force on sphere L due to spheres K and M is
A. to the left of the page
B. to the right of the page
C. toward the top of the page
D. toward the bottom of the page
4. At point P, above sphere L, the direction of the net electric field is mostly
A. to the left of the page
B. to the right of the page
C. toward the top of the page
D. toward the bottom of the page
(also B2.2k)
B1.8k compare, qualitatively and quantitatively, the inverse square relationship as it is expressed by Coulomb's law and by Newton's universal law of gravitation.
B1.3s infer from empirical evidence, the mathematical relationship among charge, force , distance between point charges. Use free-body diagrams to describe electrostatic forces acting on a charge. Use graphical techniques to analyze data.
Use the following information to answer the next question
5. The net electrostatic force on sphere III that is caused by the charges on spheres I and II is
A. 6.99 × 10-4 N, right
B. 1.06 × 10-3 N, right
C. 6.99 N, right
D. 10.6 N, right
Use the following information to answer the next question
1. Which of the following free-body diagrams, drawn to scale, illustrates the electrostatic forces acting on a positive test charge placed at point P?
A. B.
C. D.
B2.1k define vector fields
B2.2k compare forces and fields
1. The electric field strength at a distance of 4.00 cm from a 1.20 × 10-5 C point charge, expressed in scientific notation, is a.bc × 10d N/C. The values of a, b, c, and d are ______, ______, ______, and ______.
(Record the four digits of your answer in the numerical-response section on the answer sheet.)
B2.3k compare, qualitatively, gravitational potential energy and electric potential energy
Numerical Response
B2.4k define electric potential difference as a change in electric potential energy per unit of charge
2. As an electron accelerates in an electric field and moves farther from the negatively charged plate, its kinetic energy ____i____ , because its electric potential energy ___ii___ , because of the work done by the electric ___iii_____ .
The statement above is completed by the information in row
Row i ii iii
A. increases decreases field
B. increases decreases forces
C. decreases increases field
D. decreases increases force
B2.5k calculate the electric potential difference between two points in a uniform electric field
B2.6k explain, quantitatively, electric fields in terms of intensity (strength) and direction, relative to the source of the field and to the effect on an electric charge
1. Two parallel plates are 3.00 cm apart and there is an electric potential difference of 44.0 V between them. The electric field strength between the plates 1.00 cm from the positively charged plate, express in scientific notation, is a.bc × 10d N/C. The values of a, b, c, and d are ______, ______, ______, and ______.
(Record the four digits of your answer in the numerical-response section on the answer sheet.)
B2.7k define electric current as the amount of charge passing a reference point per unit of time
Numerical Response
B2.8k describe, quantitatively, the motion of an electric charge in a uniform electric field
B2.9k explain, quantitatively, electrical interactions using the law of conservation of energy
Use the following information to answer the next question.
2. How much work is required to move an electron from location I to location II?A. 5.8 x 10-17 JB. 1.5 x 10-16 JC. 1.6 x 10-16 JD. 1.9x10-16 J
B2.10k explain Millikan's oil-drop experiment and its significance relative to charge quantization.
6. An oil drop of mass 6.6 × 10-14 kg is suspended in an electric field of 2.0 × 106 N/C between horizontal plates that are 4.0 × 10-2 m apart. The number of excess electrons on the oil drop is
A. 1
B. 2
C. 5
D. 20
B2.2s plot electric fields, using field lines, for fields induced by discrete point charges, combinations of descrete point charges and charged parallel plates
B2.3s analyze, quantitatively, the motion of an electric charge following a straight or curved path in a uniform electric field, using Newton’s second law, vector addition and conservation of energy. Express energy in terms of electron volts, when appropriate. Use free-body diagrams to describe the forces acting on a charge in an electric field.
Use the following information to answer the next two questions.
1. The horizontal distance travelled by an electron in the beam in the region between the horizontal plates is _________cm.
(Record your three digits of your answer in the numerical-response section on the answer sheet.)
3. Two of the physics principles numbered on the data sheet must be used to determine the horizontal distance travelled by an electron in the beam in the region between the horizontal plates. The two principles, in the order in which they must be used, are
Number: ___________ and ___________Physics Principle: Used First Used Second
(Record the two digits of your answer in the numerical-response section on the answer sheet.)
Numerical Response
Numerical Response
B3.1k describe magnetic interactions in terms of forces and fields
B3.2k compare gravitational, electric and magnetic fields (caused by permanent magnets and moving charges) in terms of their sources and directions
B3.3k describe how the discoveries of Oersted and Faraday form the foundation of the theory relating electricity to magnetism
B3.4k describe, qualitatively, a moving charge as the source of a magnetic field and predict the orientation of the magnetic field from the direction of motion
Use the following information to answer the next question
7. The magnetic field created inside the solenoid is directed
A. into the page
B. out of the page
C. toward the left of the page
D. toward the right of the page
B3.5k explain, qualitatively and quantitatively, how a uniform magnetic field affects a moving electric charge, using the relationships among charge, motion, field direction and strength, when motion and field directions are mutually perpendicular
B3.6k explain, quantitatively, how uniform magnetic and electric fields affect a moving electric charge, using the relationships among charge, motion, field direction and strength, when motion and field directions are mutually perpendicular
1. The path of a charged particle travelling perpendicularly through a uniform magnetic field is deflected due to _____i_____ and the speed of the charged particle will ___ii___.
The statement above is completed by the information in row
Row i iiA. an unbalanced magnetic force stay the sameB. an unbalanced magnetic force increaseC. a balanced centripetal force stay the sameD. a balanced centripetal force increase
B3.7k describe and explain, qualitatively, the interaction between a magnetic field and a moving charge and between a magnetic field and a current-carrying conductor
Use the following information to answer the next question
8. As the negatively charged particle enters the magnetic field, the direction of the magnetic force that is experiences is
A. into the page
B. out of the page
C. toward the top of the page
D. toward the bottom of the page
Use the following information to answer the next question.
1. The ring swings ___i___ the magnet and the electron flow at point P is toward the ___ii___ of the page.
The statement above is completed by the information in row
Row i ii
A. away from topB. away from bottom
C. toward top
D. toward bottom
B3.8k explain, quantitatively, the effect of an external magnetic field on a current-carrying conductor
Use the following information to answer the next question
3. The length of the wire that is inside of and perpendicular to the magnetic field, expressed in scientific notation, is ____________ × 10-w m.
(Record your three digits of your answer in the numerical-response section on the answer sheet.)
B3.9k describe, qualitatively, the effects of moving a conductor in an external magnetic field, in terms of moving charges in a magnetic field.
Numerical Response
B3.3s state a conclusion, based on experimental evidence that describes the interactions of a uniform magnetic field and a moving or current-carrying conductor. Analyze, quantitatively, the motion of an electric charge following a straight or curved path in a uniform magnetic field, using Newton’s second law and vector addition. Analyze, quantitatively, the motion of an electric charge following a straight path in uniform and mutually perpendicular electric and magnetic fields, using Newton’s second law and vector addition. Use free-body diagrams to describe forces acting on an electric charge in electric and magnetic fields.
Use the following information to answer the next two questions.
1. The magnitude of the instantaneous acceleration experienced by an electron as it first enters the region containing the perpendicular fields, expressed in scientific notation, is a.b x 10-cd m/s2. The values of a, b, c, and d are ______, ______, ______, and ______,
(Record all four digits of your answer in the numerical-response section on the answer sheet.)
4. Two of the physics principles numbered on the data sheet must be used to determine the magnitude of instantaneous acceleration experienced by an electron as it first enters the region containing the perpendicular fields. The two principles, in the order in which they must be used, are
Number: ___________ and ___________Physics Principle: Used First Used Second
(Record the two digits of your answer in the numerical-response section on the answer sheet.)
Numerical Response
Numerical Response
9. Which of the following unit combinations is appropriate for magnetic field strength?
A.N·m
A
B.N·Am
C.N·mC·s
D.N·sC·m
Use the following information to answer the next three questions
3. The magnitude of the magnetic field in the magnetic lens, expressed in scientific notation, is __________ × 10-w T.
(Record your three digits of your answer in the numerical-response section on the answer sheet.)
10. The instantaneous radius of the resulting spiral of the electron’s path in the magnetic lens is
A. 5.17 × 103 mB. 3.54 × 10-1 mC. 1.93 × 10-4 mD. 7.29 × 10-12 m
11. The collision that produces a backscattered electron is classified as _____i______ because there is _____ ii ______ in the kinetic energy of the system.
The statement above is completed by the information in row
Row i iiA. elastic a decreaseB. elastic no changeC. inelastic a decreaseD. inelastic no change
Numerical Response