A half ring of radius R is charged with a linear charged density $\lambda$. The field at the centre is

Q. Find the electric field at the centre of a uniformly charged semicircular ring of radius R and linear charge density $\lambda$ :

Q. A uniformly charged semicircular arc of radius $R$ has a linear charge density $\lambda$ . The electric field at its centre is :

Q. Half ring of radius $a$ is uniformly charged with linear charge density $\lambda$. Find out electric field intensity at point $O$.

Q. What is the electric field at the centre $(x=0,y=0)$ of a charged semi-circle of radius $R$ and linear charge density $\lambda$?