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Presentation9.notebook
January 29, 2013
Four point charges are at the corners of a square of side a as
shown in the figure. Determine the magnitude and direction of
the resultant electric force on q, with ke, q and a in symbolic
form.
Presentation9.notebook
Induction
January 29, 2013
Presentation9.notebook
January 29, 2013
Electric Field
o
Presentation9.notebook
January 29, 2013
2 A test charge of +3μC is at a point P where the electric
field due to other charges is directed to the right and has
a manitude of 4 x 106 N/C. If the test charge is replaced
with a charge of -3μC, the electric field at P
has the same magnitude as before, but changes
direction
B increases in magnitude and changes direction
C remains the same
D decreases in magnitude and changes direction
A
3 A circular ring of charge with a radius of "b" has a total
charge q uniformly distributed around it. Find the
magnitude of the electric field in the center of the ring.
A
B
C
D
E
0
keq/b2
keq2/b2
keq2/b
none of the above
Presentation9.notebook
January 29, 2013
Each of the protons in a particle beam has a kinetic energy
of 3.25 x 10-15 J. What are the magnitude and direction of
the electric field that will stop these protons in a distance of
1.25 m?
mp=1.67 x 10-27 kg
qp=1.60 x 10-19 C
Presentation9.notebook
January 29, 2013
Electric Field
Electric Field
+q
-2q
Presentation9.notebook
January 29, 2013
Electric Field Lines
Electric Field
&
Electric Field Vector