How electric flux is related to the number of electric field lines?

Electric flux is proportional to the number of electric field lines going through a virtual surface. For a non-uniform electric field, the electric flux dΦE through a small surface area dS is given by dΦE=E⋅dS d Φ E = E ⋅ d S (the electric field, E, multiplied by the component of area perpendicular to the field).

Why number of field line enclosing the area remains constant at any distance?

As the electric field varies inversely with the square of the distance from a point charge, thus the area enclosing the charge increases as we move away from the charge. The number of field lines crossing the enclosing area remains constant, whatever be the area’s distance from the charge.

What is the relation between the number of field lines per unit area and the field strength?

The electric field strength is exactly proportional to the number of field lines per unit area, since the magnitude of the electric field for a point charge is E=k|Q|r2 E = k | Q | r 2 and area is proportional to r2.

Is the number of field lines passing normal to the area of the surface?

The number of electric lines of force passing normally through unit area is called of flux density.

Is electric field lines and electric flux same?

electric flux, property of an electric field that may be thought of as the number of electric lines of force (or electric field lines) that intersect a given area. The negative flux just equals in magnitude the positive flux, so that the net, or total, electric flux is zero. …

What do you mean by flux of an electric field?

Electric flux is the measure of flow of the electric field through a given area. Electric flux is proportional to the number of electric field lines going through a normally perpendicular surface.

How does the electric flux electric field enclosing a given charge vary?

How does the electric flux, electric field enclosing a given charge vary when the area enclosed by the charge is doubled? thus doubling the area will double the flux. But in the case given in question ,the guassian surface area enclosing the charge is doubled then in such a case the flux will remain unchanged.

Does electric flux depend on area?

The numerical value of the electric flux depends on the magnitudes of the electric field and the area, as well as the relative orientation of the area with respect to the direction of the electric field. The same number of field lines cross each surface.

Can electric field lines cross each other?

Electric field lines never cross each other. Electric field lines are most dense around objects with the greatest amount of charge. At locations where electric field lines meet the surface of an object, the lines are perpendicular to the surface.

How do electric field lines represent the magnitude of an electric field?

As for the magnitude of the field, that is indicated by the field line density—that is, the number of field lines per unit area passing through a small cross-sectional area perpendicular to the electric field. This field line density is drawn to be proportional to the magnitude of the field at that cross-section.

What direction do electric field lines travel?

These pattern of lines, sometimes referred to as electric field lines, point in the direction that a positive test charge would accelerate if placed upon the line. As such, the lines are directed away from positively charged source charges and toward negatively charged source charges.

Is the number of electric lines of flux passing through a unit area Mcq?

EXPLANATION: The number of electric lines of force passing through unit area is called electric flux. So option 1 is correct. The electric charge per unit area is called electric surface charge density of that surface.

What is the unit of electric flux?

1. ELECTRIC FLUX  The number of electric field lines crossing a given area kept normal to the electric field lines is called electric flux  It is usually denoted by the Greek letter ΦE and its unit is N m2 C-1.  Electric flux is a scalar quantity and it can be positive or negative. 2. Electric field of a point charge 4.

What happens to flux when an electric field is rotated?

On the other hand, if the area rotated so that the plane is aligned with the field lines, none will pass through and there will be no flux. The flux of an electric field through the shaded area captures information about the “number” of electric field lines passing through the area.

How do you find the electric flux through a square-shaped area?

The electric flux through a square-shaped area of side 5 cm near a large charged sheet is found to be when the area is parallel to the plate. Find the charge density on the sheet. Two large rectangular aluminum plates of area face each other with a separation of 3 mm between them. The plates are charged with equal amount of opposite charges,.

Why do electric field lines cross the surface of a box?

The reason is that the sources of the electric field are outside the box. Therefore, if any electric field line enters the volume of the box, it must also exit somewhere on the surface because there is no charge inside for the lines to land on.