Deck 7: Electric Fields

Question 1

An electric field is most directly related to:

A) the momentum of a test charge
B) the kinetic energy of a test charge
C) the potential energy of a test charge
D) the force acting on a test charge
E) the charge carried by a test charge

Answer 1

the force acting on a test charge

Question 2

Electric field lines:

A) are trajectories of a test charge
B) are vectors in the direction of the electric field
C) form closed loops
D) cross each other in the region between two point charges
E) are none of the above

Answer 2

are none of the above

Question 3

An isolated charged point particle produces an electric field with magnitude E at a point 2 m away. At a point 1 m from the particle the magnitude of the field is:

A) E
B) 2E
C) 4E
D) E/2
E) E/4

Answer 3

4E

Question 4

The electric field due to a uniform distribution of charge on a spherical shell is zero:

A) everywhere
B) nowhere
C) only at the center of the shell
D) only inside the shell
E) only outside the shell

Question 5

An electron traveling north enters a region where the electric field is uniform and points north. The electron:

A) speeds up
B) slows down
C) veers east
D) veers west
E) continues with the same speed in the same direction

Question 6

An electron traveling north enters a region where the electric field is uniform and points west. The electron:

A) speeds up
B) slows down
C) veers east
D) veers west
E) continues with the same speed in the same direction

Question 7

The purpose of Milliken's oil drop experiment was to determine:

A) the mass of an electron
B) the charge of an electron
C) the ratio of charge to mass for an electron
D) the sign of the charge on an electron
E) viscosity

Question 8

The force exerted by a uniform electric field on a dipole is:

A) parallel to the dipole moment
B) perpendicular to the dipole moment
C) parallel to the electric field
D) perpendicular to the electric field
E) none of the above