Quiz 1 (A)

A  1.72 × 105 N·m2/C

B  1.35 × 108 N·m2/C

C  2.58 × 105 N·m2/C

D  1.03 × 106 N·m2/C

E  8.13 × 108 N·m2/C

A  2.5 × 106 N to the left

B  4.5 × 107 N to the right

C  2.5 × 106 N to the right

D  1.1 × 106 N to the right

E  1.1 × 106 N to the left

A  can have any amount of charge.

B  are about 2000 times less massive than electrons.

C  are about 2000 times more massive than electrons.

D  have 1/2000 the charge of electrons.

E  have 2000 times the charge of electrons.

A  There are more positive charges near the top and bottom of the sphere compared to the sides next to the two other spheres.

B  There are more positive charges near the sides of the sphere that are next to the other two spheres compared to the other regions of the sphere.

C  None of these is correct.

D  The positive charges stay uniformly distributed on the surface of the middle sphere.

E  There are more positive charges near the front and back of the sphere compared to the sides next to the two other spheres.

A  Its position depends on the size of the charges.

B  It must be on the line joining the charges but not between the charges.

C  It cannot be on the line joining the charges.

D  None of these is correct.

E  It must be on the line joining the charges and between the charges.

A  the mass of the particle

B  the inverse-square law

C  permeability

D  the charge on the particle

E  permittivity

A  0.373 mN.

B  3.11 mN.

C  1.02 μN.

D  1.25 mN.

E  1.13 mN.

A  The direction of each line indicates the direction that a positively charged particle would move if placed at that point in the electric field.

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

C  Electric field lines cross midway between charges that have equal magnitude and sign.

D  The lines begin on positive charges and end on negative charges.

E  The density of the lines (the number per unit area perpendicular to the lines) is proportional to the magnitude of the field at that point.

A  is parallel to the surface.

B  depends only on the curvature of the surface.

C  depends only on the area of the conductor.

D  depends only on the total charge on the conductor.

E  depends on the area and curvature of the conductor and on its charge.

A  None of these is correct.

B  in the direction opposite to E.

C  in the same direction as E.

D  zero because the speed is zero.

E  perpendicular to E.

A  2000 times greater than

B  equal to

C  None of these answers is correct.

D  negligible compared to

E  2000 times less than

A  Electric field lines begin on positive charges (or at infinity) and end on negative charges (or at infinity).

B  The lines are drawn symmetrically entering or leaving an isolated charge.

C  At large distances from a system of charges, the field lines are equally spaced and radial, as if they came from a single point charge equal to the net charge of the system.

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

E  All of these statements are true.

A  Both have the same charge.

B  Neither is charged.

C  At least one sphere is charged.

D  They are oppositely charged.

E  Both are charged.

A  None of these is correct.

B  exert no forces on each other.

C  repel each other.

D  also have the same magnitude.

E  attract each other.

A  None of these answers is correct.

B  charge is neither quantized nor conserved.

C  charge is quantized and conserved.

D  charge is quantized but not conserved.

E  charge is conserved but not quantized.

A  the charges are not necessarily equal in magnitude but have the same sign.

B  the charges are not necessarily equal in magnitude but have opposite signs.

C  there is not enough information to say anything specific about the charges.

D  the charges are equal in magnitude but opposite in sign.

E  the charges are equal in magnitude and have the same sign.

A  a constant velocity in the direction of the field.

B  an approximately constant acceleration in a direction opposite to that of the field.

C  an approximately constant acceleration in a direction at right angles to the field.

D  a constant velocity in a direction opposite to that of the field.

E  an approximately constant acceleration in the direction of the field.