Equation of scaler potential problem

tomalku · Mar 21, 2018

Homework Statement

$Printed exam question 2(c): calculate the values of phi and vector A at a field point due to an electron with r = 1 mm, theta = 60°, beta = 0.5, mu0 = 4π × 10^-7 henry/meter, eps0 = 9 × 10^-12 farad/meter, e = 1.6 × 10^-19 C.$

Homework Equations

Equations of Lienard Wiechert Potential

The Attempt at a Solution

I had used the equation of scaler potential. I don't understand how to use angle 60 degree is this equation. suggestion needed

Let'sthink · Mar 21, 2018

I think the statement of problem is not complete. r and θ give you the coordinates of the electron as x = r cos θ and y = r sin θ; as β = 0.5 means electron is not given to be at rest.In that case we should know the relative orientation of velocity vector of electron relative to position vector or i and j.

Equation of scaler potential problem

Homework Statement

Homework Equations

The Attempt at a Solution

Discussion

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