Podcast
Questions and Answers
What information do field lines provide about the electric field?
What information do field lines provide about the electric field?
- Magnitude of the electric field
- Number of field lines per unit length
- Direction of the electric field at different points in space (correct)
- Density of the field lines
How does the number of field lines passing through an enclosing area change with distance from a point charge?
How does the number of field lines passing through an enclosing area change with distance from a point charge?
- Decreases linearly with distance
- Varies inversely with the square of the distance
- Remains constant regardless of distance (correct)
- Increases linearly with distance
In what manner do field lines crowd where the electric field is strong?
In what manner do field lines crowd where the electric field is strong?
- They become thicker (correct)
- They do not crowd at all
- They become more spaced out
- They become thinner
What is the relationship between the number of field lines crossing an area element and the magnitude of the electric field at that point?
What is the relationship between the number of field lines crossing an area element and the magnitude of the electric field at that point?
What happens to field lines when the electric field strength is weak?
What happens to field lines when the electric field strength is weak?
What does the relative density (closeness) of field lines indicate?
What does the relative density (closeness) of field lines indicate?
What is the expression for the solid angle DW subtended by a small perpendicular plane area DS at a distance r in three dimensions?
What is the expression for the solid angle DW subtended by a small perpendicular plane area DS at a distance r in three dimensions?
In a given solid angle, what remains the same regarding the number of field lines?
In a given solid angle, what remains the same regarding the number of field lines?
What did Faraday call the visual representation of electric fields around charged configurations?
What did Faraday call the visual representation of electric fields around charged configurations?
What was Faraday's purpose in inventing the picture of field lines?
What was Faraday's purpose in inventing the picture of field lines?
What is the dependence of the strength of the electric field on the distance from the charge?
What is the dependence of the strength of the electric field on the distance from the charge?
How is the angle subtended by a small transverse line element Dl approximated at a distance r from a point O?
How is the angle subtended by a small transverse line element Dl approximated at a distance r from a point O?
What is physically significant when considering electric flux?
What is physically significant when considering electric flux?
What is the unit of electric flux?
What is the unit of electric flux?
How can the total electric flux through a surface be calculated?
How can the total electric flux through a surface be calculated?
What condition needs to be satisfied for the approximation in calculating electric flux to be exact?
What condition needs to be satisfied for the approximation in calculating electric flux to be exact?
In what direction is the line connecting the two charges of an electric dipole defined?
In what direction is the line connecting the two charges of an electric dipole defined?
What is true about the total charge of an electric dipole?
What is true about the total charge of an electric dipole?
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