Question

RC-1A charge +Q is evenly distributed around a semicircle of radius R in the x-y plane as shown to the right. a) Use dq charge elements to explain why the net field at the center of the semicircle (the origin) has no y component. Use a drawing like the one shown in your explanation. b) Apply Coulomb's law to calculate the strength (magnitude) of the net electric field at the origin in terms of K, Q, R and any other constants needed. Answers Qd pcos0 RC-0 a abl where θ is the angle of dE from the x axis d) r, θ and φ p-o 2㎡__ i and φ is the angle of dq from the yzxis 2KQ

Answer 1

As tas the direcrion of the y components of electric field all are opposite to each other but same in magnitude, the vector sum must be zero...i shown this mathematically also..