(Multiple choice)

(1)

Which of the following statements about Electric field lines is (are) not true??

(a) The number of lines leaving a positive charge or entering a negative charge is proportional to the charge.?

(b) The lines begin on positive charges and end on negative charges.?

(c) The density of lines (the number per unit area perpendicular to the lines) is proportional to the magnitude of the field.?

(d) Electric field lines cross midway between charges that have equal magnitude and sign.

(2)

A charged insulator and an uncharged metal?

(a) Always repel one another.?

(b) Exert no electrostatic force on one another.?

(c) Always attract one another.?

(d) May attract or repel, depending on the sign of the charge on the insulator.

(3)

Which of the following statements are true??

(a) A positive charge experiences an attractive electrostatic force toward a nearby neutral conductor.?

(b) A positive charge experiences no electrostatic force near a neutral conductor.?

(c) A positive charge experiences a repulsive force, away from a nearby conductor.?

(d) Whatever the force on a positive charge near a neutral conductor, the force on a negative charge is then oppositely directed.?

(e) None of the above is correct.

(4)

The electric field lines around an electrical Dipole are best represented by which, if any, of the diagrams in Figure?

(5) True / False

(a) The electric field of a point charge always points away from the charge.

(b) All macroscopic charges Q can be written as Q = ±Ne, where N is an integer and e is the charge of the electron.

(c) Electric field lines never diverge from a point in space.

(d) Electric field lines never cross at a point in space.

(e) All molecules have electric dipole moments in the presence of an external electric field.

Transcribed Image Text:

(a) (b) (d) (c)