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Unformatted text preview: otential inversely
proportional to the larger radius”
(MRD) Preflight 4
Preflight 4 100
0 7 “The potentials will be equal
because the wire makes the two
spheres into one conductor.”
(AMS) Preflight 6
Preflight 6 80
0 8 “The lower potential at A causes
charges from the higher potential
from B to flow into A.” (CFL)
from Preflight 8
Preflight 8 A small positive charge is placed near a conducting sphere with net negative
charge, -Q. Which of the following figures best represents the distribution of
excess net negative charge as viewed from the center cross-section of the
70 • When +q moved near to conducting sphere, charges will move
• Negative charges in conductor will move toward +q
• What determines the final distribution?
• total E must be equal to zero in conductor
• C and D are nonstarters….
• A and B better, but excess charge must be on surface 60
0 Preflight 10
BB THIS ONE WAS TOUGH
• I’ll show you some explanations
• We’ll vote • We’ll do some work
• We’ll vote again
“Since the distance between plates decreases and the potential remains the same, then the
charge increases, so Q1>Q0. Therefore, since the potential remains the same but the charge
increases, the capacitance also increases, so C1>C0. “
“Capacitance is only dependent on the geometry of the planes of the capacitator, therefore if
the distance separat...
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This document was uploaded on 02/13/2014.
- Spring '14