# Question: Does Flux Have Direction?

## Does electric flux have direction?

The electric flux through the top face (FGHK) is positive, because the electric field and the normal are in the same direction.

The electric flux through the other faces is zero, since the electric field is perpendicular to the normal vectors of those faces..

## Is flux positive or negative?

Remember our convention for flux orientation: positive means flux is leaving, negative means flux is entering. In this example, water is falling downward, or entering the tube. This means the top surface has negative flux (it appears to be siphoning up water).

## What is flux formula?

Electric Flux Formula. The electric flux through a planar area is defined as the electric field times the component of the area perpendicular to the field. Electric flux = Electric field * Area * (angle between the planar area and the electric flux) The equation is: Φ = E A cos(θ)

## When magnetic flux is maximum?

The magnetic flux through the plane of the coil has its maximum value when this plane is perpendicular to the magnetic field lines between the poles. As the coil turns and the plane of the coil becomes parallel to the field lines, the flux becomes zero.

## What is flux density formula?

Flux density is simply the total flux divided by the cross sectional area of the part through which it flows – B = Φ / Ae teslas. Thus 1 weber per square metre = 1 tesla. Flux density is related to field strength via the permeability. B = μ × H.

## What is motional EMF?

An emf induced by motion relative to a magnetic field B is called a motional emf and is given by. emf = Bℓv (B,ℓ, and v perpendicular) where ℓ is the length of the object moving at speed v relative to the field.

## Does flux depend on area?

The flux of a vector field through a surface area is the amount of whatever the field represents passing through the area. The total flux depends on strength of the field, the size of the surface area it passes through, and on how the area is oriented with respect to the field.

## What does flux rate mean?

Flux as flow rate per unit area. In transport phenomena (heat transfer, mass transfer and fluid dynamics), flux is defined as the rate of flow of a property per unit area, which has the dimensions [quantity]·[time]−1·[area]−1. The area is of the surface the property is flowing “through” or “across”.

## Does magnetic flux have a direction?

The general direction for the magnetic flux flow is from the North ( N ) to the South ( S ) pole. … Lines of force have a definite DIRECTION from North to South. Lines of force that are close together indicate a STRONG magnetic field. Lines of force that are farther apart indicate a WEAK magnetic field.

## Can you have negative flux?

The negative flux just equals in magnitude the positive flux, so that the net, or total, electric flux is zero. … If a net charge is contained inside a closed surface, the total flux through the surface is proportional to the enclosed charge, positive if it is positive, negative if it is negative.

## What is the right hand rule in physics?

The right hand rule states that, to find the direction of the magnetic force on a positive moving charge, the thumb of the right hand point in the direction of v, the fingers in the direction of B, and the force (F) is directed perpendicular to the right hand palm.

## What is Faraday’s law formula?

The equation for the EMF induced by a change in magnetic flux is. EMF=−NΔΦΔt EMF = − N Δ Φ Δ t . This relationship is known as Faraday’s law of induction. The units for EMF are volts, as is usual.