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Notes on General Physics II for Exam 2 | PHYS 122, Exams of Physics

New Mexico Institute of Mining & Technology (NMT)Physics

Material Type: Exam; Class: General Physics II; Subject: Physics; University: New Mexico Institute of Mining and Technology; Term: Unknown 1989;

Typology: Exams

Pre 2010

Uploaded on 08/08/2009

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Phys. 122-02: Wednesday, 15 October
•EXAM 2: coming soon, to a classroom near you.
Remember to bring your calculator and a formula
sheet! Homework solutions are posted outside my
office.
HW 7: ch. 26, problems 28, 35, 41, 44, 45,
and 63. Due next Wednesday.
Mastering Physics: New assignment will
be available Friday after the exam.
iClickers: Register online if you have not
already!
Midterm grades will NOT include clicker scores
if you haven't registered by then.
Reading: Begin chapter 27 for Monday.
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Download Notes on General Physics II for Exam 2 | PHYS 122 and more Exams Physics in PDF only on Docsity!

Phys. 122-02: Wednesday, 15 October

  • (^) EXAM 2: coming soon, to a classroom near you. Remember to bring your calculator and a formula sheet! Homework solutions are posted outside my office.  HW 7: ch. 26, problems 28, 35, 41, 44, 45, and 63. Due next Wednesday.  Mastering Physics: New assignment will be available Friday after the exam.  iClickers: Register online if you have not already! Midterm grades will NOT include clicker scores if you haven't registered by then.  Reading: Begin chapter 27 for Monday.

Magnetic field sources: the same things

which feel magnetic fields also cause them!

(Charged particles in motion also do the trick.)

Ampere's Law: the actual “shortcut” for

finding the B field when things are very

symmmetrical.

Another “right-hand rule”: this one is a shortcut

for finding the direction of the B field created

by a current.

Treat B field lines as you do E lines: they point along the direction of the little (straight) vectors of the field. Density (closeness) of field lines gives the length of the field vectors.

Clickers: Point A is at a higher electric potential

than point B. Which way is current flowing

through the central (horizontal) resistor?

a) To the left b) To the right c) Neither; no current flows d) Out of the page e) Need more information to tell

Clickers: All values are known for the labeled

things below, except the battery EMF. With the

switch closed, the current through R 2 is

measured. This lets us also determine....

a) The charge on C b) The current through R 1 c) The current into C d) The battery EMF e) All of the above

... becomes same charges on capacitors in

series (by integrating the same currents

over time).

The node/junction rule is just conservation of

charge (in motion)!

Clickers: The battery below has the internal

resistance shown. What will a voltmeter across

the battery terminals read?

a) 12 V b) 9.5 V c) 14.5 V d) 0 V e) 125 A

Clickers: What determines the direction of

the currents in the circuit below?

a) The values of the resistors b) The lengths of the wires c) The internal resistances of the batteries d) The negative charge on electrons e) The relative strengths of the battery EMFs

Clickers: what does the magnetic version

of Gauss' Law tell us?

a) Magnetic field surfaces never enclose any charge

  • (^) b) Magnetic field loops never enclose any current
  • (^) c) Magnetic field lines always end on negative charge
  • (^) d) Magnetic field lines can't begin nor end
  • (^) e) Closed surfaces are impossible to draw in magnetic fields