PHYS 122 Chapter Notes - Chapter 24: Field Line, Electric Field, Translational Symmetry

Which of the following statements are not true for electric field lines? 

(A) Electric field lines are close together in regions of space where the magnitude of the electric field is strong and are farther apart where it is weak.

(B) Electric field lines can never intersect.

(C) At every point in space, the electric field vector at that point is tangent to the electric field line through that point.

(D) Electric field lines are close together in regions of space where the magnitude of the electric field is weak and are farther apart where it is strong.

(E) Electric field lines point away from positive charges and toward negative charges.

(F) Electric field lines are continuous; they do not have a beginning or an ending.

(G) At every point in space, the electric field vector at that point is perpendicular to the electric field line through that point.

1. Electric field lines begin on negative charges and end onpositive charges.

2. When electric field lines are curved, the electric field at anypoint is tangent to the field line at that point.

3. If the electric field strength is 900 N/C at a point 5 cm froman infinite plane of charge, its strength will be reduced to 9 N/Cat a point 50 cm from the plane.

Please explain

Which of the following statements are true for magnetic field lines? Check all that apply.

(a) magnetic field lines can never intersect.

(b) Magnetic field lines point in the direction of the magnetic force acting on a charge.

(c) At every point in space, the magnetic field vector at that point is tangent to the magnetic field line through that point.

(d) Magnetic field lines are close together in regions of space where the magnitude of the magnetic field is weak, and they are farther apart in regions where it is strong.

(e) Unlike electric field lines, magnetic field lines are continuous.