Physics II -
Conceptual Items for 2nd Exam on Circuits and Magnetism
questions you should be able to answer)
does adding resistors in series increase the resistance?
Why does adding resistors in parallel decrease the resistance?
What fundamental conservation principles are behind Kirchoffs Laws?
What is the origin of magnetism?
Why does a moving charge experience a force in a magneic field when a
stationary charge does not?
Why does the direction of the current matter when determining the
force on a current carrying wire?
What do the magnetic field lines around a bar magnet look like?
Why is the magnetic force a maximum when the current carrying wire is
perpendicular to the magnetic field?
How does an electric motor work (think also of energy conversion here)?
How does an electric generator work (think also of energy conversion
Why use a solenoid instead of a bunch of straight wires to produce a
In the environment of the Earth, will current carrying wires "always"
experience some magnetic force?
What is meant by magnetic "flux"?
What is being "induced" in Faraday's law of magnetic induction?
What is the importance of Lenz's law?
What is the importance of the word "change" when describing
electromagnetic effects (i.e., what is doing the changing)?
What is an electromagnet?