A positive point charge, initially at rest at point A at t = 0 has undergone a complete harmonic oscillation from point A to B and back to A ending at t. At the moment shown below, the charge is again at rest. The two circles have width c(t) and the region between them contains the electric field emitted while the charge was oscillating. Complete the electric field lines in this region.
Go to Oscillating E-fieldlines.