General Physics – ph 213
Name:____________
Midterm Exam II (Ch 24 – 27)
Type A
November 14, 2005
Exam is closed book and closed notes. Use only your note card.
Write all work and answers in the papers provided.
Show all your work and explain your reasoning
(No credit will be given for an answer
that does not include the necessary solution or
explanation, except for true/false or
multiple choice questions)
Partial credit may be awarded for a correct method of solution, even if the answer is
wrong.
Part I – True or False (2.5 points each):
For questions 1 – 11, state whether each statement is true
or false.
1. The change in electric potential energy,
U
b
–
U
a
, is the work done on a charge by the electric
force as it moves from point
a
to point
b
.
2. The potential due to a spherically symmetric charge distribution is the same as that of a point
charge
.
3.
Equipotential surfaces are always flat and perpendicular to the electric field.
4. The units of
,
the permittivity of free space, may be expressed as F/m.
5. The fatter a given length of wire is the higher its resistance will be
.
6. In an alternating current, the charge carriers switch between electrons and protons in a repeated
fashion.
7. A 1200-W toaster draws more current than a 1000-W toaster.
Part II – Multiple choice questions:
For questions 8 – 16
select the only one choice that best
answers or completes each statement.
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- Summer '14
- AhmadRajabzadeh
- Physics, Electrostatics, Work, Electric charge, power supply
-
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