Physics Chapter 22 Questions ACTUAL UPDATED QUESTIONS AND CORRECT
ANSWERS
1. A uniform electric field of magnitude 5.8 X lO^2 N/C
passes
through a circle of radius 13 cm. What is the electric flux
through the circle when its face is (a) perpendicular to
the field lines, (b) at 450 to the field lines, and (e) parallel
to the field lines?
2. (I) The Earth possesses an electric field of (average)
magni- tude 150N/C near its surface. The field points
radiaLly inward. Calculate the net electric flux outward
through a spherical surface surrounding, and just beyond,
the Earth's surface.
(II) A cube of side t is placed in a uniform field Eo with
edges parallel to the field lines. (a) What is the net flux
through the cube? (b) What is the flux through each of its
six faces?
4. (II) A uniform field E is parallel to the axis of a hollow
hemisphere of radius r, Fig. 22-25. (a) What is the electric
flux through the hemispherical
surface? (b) What is the result
if E is instead axis?
perpendicular to the
5. The total electric flux from a cubical box 28.0 cm on a
side is 1.84 X 103N·mz/C. What charge is enclosed by the
box?
8. A ring of charge with uniform Charge Density
completely enclosed in a hollow donut shape. An exact
copy of the ring is completely enclosed in a hollow
sphere. What is the ratio of the flux out of the donut
shape to that out of the sphere?
11. A 15.0-cm-long uniformly charged plastic rod is sealed
inside a plastic bag. The total electric flux leaving the bag
is 7.3 x 105 N ·mz/C. What is the linear charge density on
the rod?
12. Draw the electric field lines around a negatively
charged
metal egg.
ANSWERS
1. A uniform electric field of magnitude 5.8 X lO^2 N/C
passes
through a circle of radius 13 cm. What is the electric flux
through the circle when its face is (a) perpendicular to
the field lines, (b) at 450 to the field lines, and (e) parallel
to the field lines?
2. (I) The Earth possesses an electric field of (average)
magni- tude 150N/C near its surface. The field points
radiaLly inward. Calculate the net electric flux outward
through a spherical surface surrounding, and just beyond,
the Earth's surface.
(II) A cube of side t is placed in a uniform field Eo with
edges parallel to the field lines. (a) What is the net flux
through the cube? (b) What is the flux through each of its
six faces?
4. (II) A uniform field E is parallel to the axis of a hollow
hemisphere of radius r, Fig. 22-25. (a) What is the electric
flux through the hemispherical
surface? (b) What is the result
if E is instead axis?
perpendicular to the
5. The total electric flux from a cubical box 28.0 cm on a
side is 1.84 X 103N·mz/C. What charge is enclosed by the
box?
8. A ring of charge with uniform Charge Density
completely enclosed in a hollow donut shape. An exact
copy of the ring is completely enclosed in a hollow
sphere. What is the ratio of the flux out of the donut
shape to that out of the sphere?
11. A 15.0-cm-long uniformly charged plastic rod is sealed
inside a plastic bag. The total electric flux leaving the bag
is 7.3 x 105 N ·mz/C. What is the linear charge density on
the rod?
12. Draw the electric field lines around a negatively
charged
metal egg.
