The hollow metal sphere shown above is positively charged. Point C is the center of the sphere and point P is any other point within the sphere. Which of the following is true of the electric field at these points?
a. It is zero at both points.
b. It is zero at C, but at P it is not zero and is directed inward.
c. It is zero at C, but at P it is not zero and is directed outward.
d. It is zero at P, but at C it is not zero.
e. It is not zero at either point.
26. What is the direction of the electric field at the origin O ?
a. b. c. d. e.
27. What is the magnitude of the electric field at the origin O?
a. b. c. d. e.
28. The diagram above shows electric field lines in an isolated region of space containing two small charged spheres, Y and Z Which of the following statements is true?
a. The charge on Y is negative and the charge on Z is positive.
b. The strength of the electric field is the same everywhere.
c. The electric field is strongest midway between Y and Z.
d. A small negatively charged object placed at point X would tend to move toward the right.
e. Both charged spheres Y and Z carry charge of the same sign.
29. As shown above, a positively charged particle moves to the right without deflection through a pair of charged plates. Between the plates are a uniform electric field E of magnitude 6.0 N/C and a uniform magnetic field B of magnitude 2.0 T, directed as shown in the figure. The speed of the particle is most nearly
a. 0.33 m/s b. 0.66 m/s c. 3.0 m/s d. 12 m/s e. 18 m/s
30. A hollow metal sphere 1.0 m in diameter carries a charge of 4.0 ?C. The electric field at a distance of 2.0 m from the center of the sphere is most nearly
a. 9.0 x 103 N/C b. 1.8 x 104 N/C c. 2.4 x 104 N/C d. 3.6 x 104 N/C e. 1.4 x 105 N/C
a. It is zero at both points.
b. It is zero at C, but at P it is not zero and is directed inward.
c. It is zero at C, but at P it is not zero and is directed outward.
d. It is zero at P, but at C it is not zero.
e. It is not zero at either point.
26. What is the direction of the electric field at the origin O ?
a. b. c. d. e.
27. What is the magnitude of the electric field at the origin O?
a. b. c. d. e.
28. The diagram above shows electric field lines in an isolated region of space containing two small charged spheres, Y and Z Which of the following statements is true?
a. The charge on Y is negative and the charge on Z is positive.
b. The strength of the electric field is the same everywhere.
c. The electric field is strongest midway between Y and Z.
d. A small negatively charged object placed at point X would tend to move toward the right.
e. Both charged spheres Y and Z carry charge of the same sign.
29. As shown above, a positively charged particle moves to the right without deflection through a pair of charged plates. Between the plates are a uniform electric field E of magnitude 6.0 N/C and a uniform magnetic field B of magnitude 2.0 T, directed as shown in the figure. The speed of the particle is most nearly
a. 0.33 m/s b. 0.66 m/s c. 3.0 m/s d. 12 m/s e. 18 m/s
30. A hollow metal sphere 1.0 m in diameter carries a charge of 4.0 ?C. The electric field at a distance of 2.0 m from the center of the sphere is most nearly
a. 9.0 x 103 N/C b. 1.8 x 104 N/C c. 2.4 x 104 N/C d. 3.6 x 104 N/C e. 1.4 x 105 N/C