Electric Potential Energy for Point Charges Quiz

What is the initial potential energy between three charges when they are infinitely far apart?

• Negative

• Positive

• Zero

• Infinite

Which constant is used in the equation to calculate the change in potential energy?

• Gravitational constant

• Boltzmann's constant

• Coulomb's constant

• Planck's constant

What is required to calculate the change in potential energy between two charges?

• The temperature of the environment

• The velocity of the charges

• The distance between the charges

• The mass of the charges

What is the charge of a hydrogen atom in a water molecule?

• -10.4 x 10^-20 C

• -5.2 x 10^-20 C

• +5.2 x 10^-20 C

• +10.4 x 10^-20 C

What type of work is done when two positive charges are brought closer together?

• Negative work

• Positive work

• No work

• Infinite work

What is the charge of the oxygen atom in a water molecule?

• -5.2 x 10^-20 C

• +5.2 x 10^-20 C

• -10.4 x 10^-20 C

• +10.4 x 10^-20 C

How is potential energy treated when calculating the total energy of a system?

• As a vector

• As a scalar

• As a tensor

• As a matrix

What is the total potential energy of the three-charge system?

• 0 J

• +8.53 x 10^-19 J

• -8.53 x 10^-19 J

• +1.6 x 10^-10 J

What type of work is done when a negative charge is brought closer to two positive charges?

• Infinite work

• Positive work

• No work

• Negative work

What must be done to separate charges that have been brought together?

• Do infinite work

• Do positive work

• Do no work

• Do negative work