Estimating Density of Electric Field Lines Quiz

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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?

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?

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?

Directly proportional Signup and view all the answers

What happens to field lines when the electric field strength is weak?

They become sparser Signup and view all the answers

What does the relative density (closeness) of field lines indicate?

Relative strength of the electric field at different points Signup and view all the answers

What is the expression for the solid angle DW subtended by a small perpendicular plane area DS at a distance r in three dimensions?

DW = DS/r^2 Signup and view all the answers

In a given solid angle, what remains the same regarding the number of field lines?

The number of radial field lines Signup and view all the answers

What did Faraday call the visual representation of electric fields around charged configurations?

Lines of force Signup and view all the answers

What was Faraday's purpose in inventing the picture of field lines?

To provide an intuitive way of visualizing electric fields Signup and view all the answers

What is the dependence of the strength of the electric field on the distance from the charge?

$1/r^2$ dependence Signup and view all the answers

How is the angle subtended by a small transverse line element Dl approximated at a distance r from a point O?

$Dq = Dl/r$ Signup and view all the answers

What is physically significant when considering electric flux?

The relative number of field lines crossing a given area Signup and view all the answers

What is the unit of electric flux?

N/C Signup and view all the answers

How can the total electric flux through a surface be calculated?

By integrating the dot product of the electric field and area element over the surface Signup and view all the answers

What condition needs to be satisfied for the approximation in calculating electric flux to be exact?

Electric field must be constant and small area element tends to zero Signup and view all the answers

In what direction is the line connecting the two charges of an electric dipole defined?

From positive charge to negative charge Signup and view all the answers

What is true about the total charge of an electric dipole?

It is zero Signup and view all the answers

Estimating Density of Electric Field Lines Quiz

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