A charged rod of length 21cm and total charge -7.5muC is bent into a three-quarter circle symetric about the x-axis as shown below
What is the magnitude of the Electric Field at the center of the three-quarter circle in N/C ?:Which directions listed below make up the components of the direction of the Electric Field at the center of the three-quarter circle?
2 answers
http://www.youtube.com/watch?v=N-WR1A7k6lo
question is asking electric field of three quarter, but that link is about one quarter and I did according to video, but I got wrong answer and I don't know the direction of components?