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Physics II
Principles of Physics (Phy 122) Test Sets 51-53
Completely document your work and your reasoning.
You will be graded on your documentation, your reasoning, and the
correctness of your conclusions.
** Write clearly in dark pencil or ink, on one side of the paper
only. **
Constants:
| k = 9*10^9 N m^2 / C^2 |
qE = 1.6 * 10^-19 C |
h = 6.63 * 10^-34 J s |
| energy of n=1 orbital in hydrogen atom: -13.6 eV |
k ' = 9 * 10^-7 T m / amp |
atomic mass unit: 1.66 * 10^-27 kg |
| electron mass: 9.11 * 10^-31 kg |
speed of light: 3 * 10^8 m/s |
Avogadro's Number: 6.023 * 10^-23 particles/mole |
10-02-2001 16:03:27
Test should be printed using Internet Explorer. If
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items are cut off then print in Landscape Mode (choose File, Print, click on Properties
and check the box next to Landscape, etc.).
Name and Signature of Student
_____________________________
Signed by Attendant, with Current Date and Time:
______________________
If picture ID has been matched with student and name as
given above, Attendant please sign here: _________
Instructions:
- Test is to be taken without reference to text or
outside notes.
- Graphing Calculator is allowed, as is blank paper or
testing center paper.
- No time limit but test is to be taken in one
sitting.
- Please place completed test in Dave Smith's folder,
OR mail to Dave Smith, Science and Engineering, Va. Highlands CC, Abingdon, Va.,
24212-0828 OR email copy of document to dsmith@vhcc.edu,
OR fax to 276-739-2590. Test must be returned by individual or agency supervising test. Test is not to be returned to student after it has been taken. Student may, if proctor deems it feasible, make and retain a copy of the test..
Directions for Student:
- Completely document your work.
- Numerical answers should be correct to 3 significant
figures. You may round off given numerical information to a precision consistent
with this standard.
- Undocumented and unjustified answers may be counted
wrong, and in the case of two-choice or limited-choice answers (e.g., true-false or
yes-no) will be counted wrong. Undocumented and unjustified answers, if wrong, never get
partial credit. So show your work and explain your reasoning.
- Due to a scanner malfunction and other errors some
test items may be hard to read, incomplete or even illegible. If this is judged by
the instructor to be the case you will not be penalized for these items, but if you
complete them and if they help your grade they will be counted. Therefore it is to
your advantage to attempt to complete them, if necessary sensibly filling in any
questionable parts.
- Please write on one side of paper only, and staple
test pages together.
Test Problems:
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Constants
Constants:
| k = 9*10^9 N m^2 / C^2 |
qE = 1.6 * 10^-19 C |
h = 6.63 * 10^-34 J s |
| energy of n=1 orbital in hydrogen atom: -13.6 eV |
k ' = 9 * 10^-7 T m / amp |
atomic mass unit: 1.66 * 10^-27 kg |
| electron mass: 9.11 * 10^-31 kg |
speed of light: 3 * 10^8 m/s |
Avogadro's Number: 6.023 * 10^-23 particles/mole |
| Gas Constant: R = 8.31 J / (mole K) |
proton mass: 1.6726 * 10^-27 kg |
neutron mass: 1.6749 * 10^-27 kg |
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Problem Number 1
What are the magnitude and the direction (in
degrees) of the electric field at the point ( 13 m, 7 m), due to a charge of 20 `microC at
( 22 m, 0 m)?
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Problem Number 2
What are the x and y components of the electric
force on a charge of 4 `microC at the point (-3.001 m,-19.01 m), due to a charge of 20 `microC at
( 11 m,-17.01 m)?
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Problem Number 3
A capacitor holds charge 8 `microC/Volt. It is in
series with a resistance of 45 Ohms.
The capacitor is charged to 89 `microC, then the
source is removed and the circuit again closed, allowing the capacitor to discharge
through the resistor.
- How much current will be flowing at the instant the
capacitor begins to discharge?
- How long will it take the capacitor to release 1% of
its charge?
- How much energy will be discharged during this time?
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Problem Number 4
What is the magnitude of the potential difference
between A and B if an average power of .4 watts is required to move 1.45 Coulombs of charge
from A to B in 7.7 seconds?
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Problem Number 5
A battery with negligible internal resistance maintains a potential difference
of 11 volts in a uniform conducting wire 2.5 meters long. What force is experienced
by a conduction electron in this wire (electron charge has a magnitude of 1.6 * 10^-19
Coulomb)?