Podcast
Questions and Answers
What is an equipotential surface?
What is an equipotential surface?
- A surface with varying potential at different points
- A surface with no electric field lines passing through
- A surface where every point has the same potential (correct)
- A surface only applicable in magnetic fields
Which property of an equipotential surface ensures no work is done in moving a test charge?
Which property of an equipotential surface ensures no work is done in moving a test charge?
- Electric field is tangential to the surface
- Electric field lines are parallel to the surface
- Electric field lines intersect on the surface
- Electric field is always normal to the surface (correct)
What condition must be satisfied for total internal reflection to occur?
What condition must be satisfied for total internal reflection to occur?
- Angle of incidence is equal to the critical angle
- Angle of incidence is less than the critical angle
- Light travels from a denser to a rarer medium (correct)
- Light travels from a rarer to a denser medium
Why do electric field lines never cross each other?
Why do electric field lines never cross each other?
Why are electrostatic field lines always normal to the surface of a conductor?
Why are electrostatic field lines always normal to the surface of a conductor?
What are two common uses of eddy currents?
What are two common uses of eddy currents?
What is the phenomenon called when a changing current in one coil induces an emf in a neighboring coil?
What is the phenomenon called when a changing current in one coil induces an emf in a neighboring coil?
Define wattless current.
Define wattless current.
Why can the voltage drop across an inductor or capacitor in a series LCR circuit be greater than the applied voltage?
Why can the voltage drop across an inductor or capacitor in a series LCR circuit be greater than the applied voltage?
What is one way to reduce iron loss in a transformer?
What is one way to reduce iron loss in a transformer?
Why are electromagnetic waves considered transverse in nature?
Why are electromagnetic waves considered transverse in nature?
How are electromagnetic waves produced?
How are electromagnetic waves produced?
