Electric Potential Energy

Which statement is TRUE?

• The SI unit for work done and potential energy is the same which is Joules.

• The SI unit of work done is Newtons while that of potential energy is Joules.

• The SI unit of work done is Joules while that of potential energy is Newtons.

• The SI unit for work done and potential energy is the same which is Newtons.

How is work done calculated?

• Getting the product of the force and displacement

• Getting the quotient of the force and displacement

• Getting the product of the force and displacement parallel to the force

• Getting the product of the force and displacement perpendicular to the force

Which of the following factors affect the gravitational potential energy an object has?

• Mass of the object

• Strength of the gravitational field

• Distance of the object from the ground

• All choices affect the gravitational potential energy of the object.

Consider an object near the surface of the Earth where the gravitational field is constant. In what direction should the object go so that its gravitational potential energy increases?

• Upward

• To the left

• Downward

• To the right

Two charged particles are at a distance from each other. What happens to their electric potential energy if the distance between them is doubled?

• It becomes two times as great.

• It becomes four times as great.

• It becomes one-half times as great.

• It becomes one-fourth times as great.

In what case will the electric potential energy between two charged particles be negative?

• When the two particles have opposite charges

• Electric potential energy will never be negative.

• When the two particles are both positively-charged

• When the two particles are both negatively-charged