ntered-at-the-origin-which-expression-gives-the-net-electric-field-at-the-center

Question

A semicircular arc of radius RR with uniform linear charge density lambda occupies the upper half of a circle centered at the origin. Which expression gives the net electric field at the center?

Accepted Answer

E→=−2kλRj^\overrightarrow{E}=-\frac{2k\lambda}{R}\hat{j}

Answer

E→=kπλRj^\overrightarrow{E}=\frac{k\pi\lambda}{R}\hat{j}

Answer

E→=2kλRj^\overrightarrow{E}=\frac{2k\lambda}{R}\hat{j}

Answer

E→=0\overrightarrow{E}=0