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Questions and Answers
What is the change in potential energy defined as?
What is the change in potential energy defined as?
- The work done in going from point a to point b (correct)
- The sum of little bits of work
- The force acting on an object
- The displacement of the object
In what scenario can the potential U at a point be defined?
In what scenario can the potential U at a point be defined?
- If the force is repulsive
- If the force is non-conservative
- If the force is conservative (correct)
- If the force is attractive
What kind of force is the electrostatic force, and how can it be represented?
What kind of force is the electrostatic force, and how can it be represented?
- Non-conservative, represented by potential energy
- Conservative, represented by potential energy (correct)
- Non-conservative, not represented by potential energy
- Conservative, not represented by potential energy
What is the work done in bringing a unit charge from infinity to a distance R from a fixed charge q?
What is the work done in bringing a unit charge from infinity to a distance R from a fixed charge q?
What is the phenomenon called that allows light to travel along a bent fibre optic cable?
What is the phenomenon called that allows light to travel along a bent fibre optic cable?
At what temperature does an object emit red hot light?
At what temperature does an object emit red hot light?
What does the critical angle (θc) obey in the phenomenon of total internal reflection?
What does the critical angle (θc) obey in the phenomenon of total internal reflection?
In which way does matter interact with light when it releases energy as light?
In which way does matter interact with light when it releases energy as light?
At what temperature does water turn to steam?
At what temperature does water turn to steam?
What is the unit of work in the International System of Units (SI)?
What is the unit of work in the International System of Units (SI)?
What is the mechanical equivalent of 1 calorie in Joules?
What is the mechanical equivalent of 1 calorie in Joules?
What is the lowest temperature that has ever been achieved?
What is the lowest temperature that has ever been achieved?
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