Electric Flux is defined as a number of electric field lines, passing per unit area. It is another physical quantity to measure the strength of electric field and frame the basics of electrostatics. It is also defined as the product of electric field and surface area projected in a direction perpendicular to the electric field. Let’s understand what the term flux actually means, with an example.
Example:
Suppose there a liquid flowing with velocity ‘v’, through tiny surface dS, in a normal direction with respect to the surface. The rate of flow of water will be volume passing through the area per unit time that is v dS.
Volume = Area × Length
Differentiating the above relation with respect to time, we get
d Volume/ dt = dS × d length/ dt
Flow of liquid = dS × v
where dS is a surface area perpendicular to the velocity v of water, and v is the velocity of liquid (rate of change of length per unit time)
This flow of liquid, that is the quantity v dS, is called flux. If there is some angle θ between the velocity of liquid and surface area dS and flux of liquid, can be evaluated from the relation:
Flow of liquid = v dS cos θ
Yogita Ingle 6 years, 5 months ago
Electric Flux is defined as a number of electric field lines, passing per unit area. It is another physical quantity to measure the strength of electric field and frame the basics of electrostatics. It is also defined as the product of electric field and surface area projected in a direction perpendicular to the electric field. Let’s understand what the term flux actually means, with an example.
Example:
Suppose there a liquid flowing with velocity ‘v’, through tiny surface dS, in a normal direction with respect to the surface. The rate of flow of water will be volume passing through the area per unit time that is v dS.
Volume = Area × Length
Differentiating the above relation with respect to time, we get
d Volume/ dt = dS × d length/ dt
Flow of liquid = dS × v
where dS is a surface area perpendicular to the velocity v of water, and v is the velocity of liquid (rate of change of length per unit time)
This flow of liquid, that is the quantity v dS, is called flux. If there is some angle θ between the velocity of liquid and surface area dS and flux of liquid, can be evaluated from the relation:
Flow of liquid = v dS cos θ
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