Pre-Class 3

A  The potential energy of a test charge increases as it moves along an equipotential surface. When all charges are at rest, the surface of a conductor is always an equipotential surface.

B  The potential energy of a test charge increases as it moves along an equipotential surface. Electric field lines and equipotential surfaces are always mutually perpendicular.

C  When all charges are at rest, the surface of a conductor is always an equipotential surface. The potential energy of a test charge decreases as it moves along an equipotential surface.

D  Electric field lines and equipotential surfaces are always mutually perpendicular. When all charges are at rest, the surface of a conductor is always an equipotential surface. An equipotential surface is a three-dimensional surface on which the electric potential is the same at every point.

A  The electric potential energy of the charge increases, and the kinetic energy decreases.

B  The electric potential energy of the charge decreases, and the kinetic energy increases.

C  Both the electric potential energy and the kinetic energy of the charge decrease.

D  Both the electric potential energy and the kinetic energy of the charge increase.

A  If you triple the value of the charge, the electric potential is 3V.

B  If you triple the value of the charge, the electric potential is V/3.

C  If you triple the value of the charge, the electric potential remains V.

D  If you triple the value of the charge, the electric potential is 9V.

E  If you triple the value of the charge, the electric potential is V/9.

A  At twice the distance, the electric potential is V/2.

B  At twice the distance, the electric potential is 4V.

C  At twice the distance, the electric potential is 2V.

D  At twice the distance, the electric potential remains V.

E  At twice the distance, the electric potential is V/4.

A  The electric potential energy of the charge decreases, and the kinetic energy increases.

B  Both the electric potential energy and the kinetic energy of the charge increase.

C  Both the electric potential energy and the kinetic energy of the charge decrease.

D  The electric potential energy of the charge increases, and the kinetic energy decreases.

A  Work is both performed and required in moving the charge from point A to point B.

B  No work is performed or required in moving the positive charge from point A to point B.

C  Work is required in moving the positive charge from point A to point B.

D  Work is performed in moving the positive charge from point A to point B.

A  The electric field does positive work on the charge. The sign of the work done on the charge cannot be determined without additional information.

B  The electric field does not do any work on the charge. The sign of the work done on the charge cannot be determined without additional information.

C  The potential energy associated with the charge increases. The electric field does negative work on the charge.

D  The potential energy associated with the charge decreases. The electric field does positive work on the charge.

A  The electric field does positive work on the charge. The potential energy associated with the charge decreases.

B  The electric field does negative work on the charge. The potential energy associated with the charge increases.

C  The sign of the work done on the charge cannot be determined without additional information. The electric field does not do any work on the charge.

D  The electric field does negative work on the charge. The sign of the work done on the charge cannot be determined without additional information.