C
+0/10
in case e a positive point charge with +o is
a distances away from a second positive
point charge +q. in case f ten positive
point charges, each with charge +q/10. lie
along an arc of radius s centered on a
positive point charge +9.
+90
s
otetgo
case e
case f
is the net electric force on the + charge in
case e greater than, less than, or equal to
the net electric force on the + charge in
case f? explain.
4. a thin semicircular rod has a total charge + uniformly distributed
along it. a negative point charge-q is placed as shown. a test
charge + is placed at point c. (point c is equidistant from - and
from all points on the rod.)
let frand fr represent the force on the test charge due to the point
charge and the rod respectively.
a. is the magnitude of fp greater than, less than or equal to the
magnitude of fr? explain how you can tell.
b. is the magnitude of the net force on +q greater than, less than or equal to the magnitude of
fp? explain.
+
c. a second negative point charge -
is placed as shown.
is the magnitude of the net electric force on +9 greater than,
less than, or equal to the magnitude of the net electric force
on + in part b? explain.
cs-