Podcast
Questions and Answers
In an electric field, if the force and the direction of displacement are opposite, what can be said about the work done and the change in electric potential energy?
In an electric field, if the force and the direction of displacement are opposite, what can be said about the work done and the change in electric potential energy?
- Work is negative and electric potential energy increases
- Work is negative and electric potential energy decreases
- Work is positive and electric potential energy increases (correct)
- Work is zero and electric potential energy remains constant
What type of motion of a charge relative to the direction of the force aids in understanding changes in electric potential energy?
What type of motion of a charge relative to the direction of the force aids in understanding changes in electric potential energy?
- Random motion
- No motion
- Circular motion (correct)
- Linear motion
What characteristic of charges makes determining the sign of the change in potential energy confusing?
What characteristic of charges makes determining the sign of the change in potential energy confusing?
- Sign (positive or negative) (correct)
- Velocity
- Acceleration
- Mass
In a uniform electric field, what does it mean if the net work done by the Coulomb force is zero?
In a uniform electric field, what does it mean if the net work done by the Coulomb force is zero?
For a pair of charges q and q0, what type of force is the Coulomb force considered to be?
For a pair of charges q and q0, what type of force is the Coulomb force considered to be?
What factor(s) determine(s) the work done by the Coulomb force for a pair of charges q and q0?
What factor(s) determine(s) the work done by the Coulomb force for a pair of charges q and q0?
If a test charge returns to its initial location in an electric field, what can we conclude about the net work done?
If a test charge returns to its initial location in an electric field, what can we conclude about the net work done?
Under what circumstances is the net work done by Coulomb force zero?
Under what circumstances is the net work done by Coulomb force zero?
What aspect allows us to differentiate between positive and negative changes in potential energy for charges?
What aspect allows us to differentiate between positive and negative changes in potential energy for charges?
