Point charge A is on the r-axis at a = -3.00 cm. At x = 1.00 cm on the a-axis its electric field is 2100 N/C. Point charge B is also on the a-axis, at a = 5.00 cm. The absolute magnitude of charge Bis twice that of A. Find the magnitude and direction of the total electric field at the origin if both A and B are positive. Express your answer in newtons per coulomb. Enter positive value if the field points in +r-direction and negative value if the field points in --direction. αν ΑΣφ- N/C Find the magnitude and direction of the total electric field at the origin if both A and B are negative. Express your answer in newtons per coulomb. Enter positive value if the field points in +x-direction and negative value if the field points in -x-direction.

A thick insulating spherical shell of inner radius a=1.2R and outer radius b=5.5R has a uniform charge density p. b. What is the magnitude of the electric field at r=8.9 R ? Express your answer using one decimal place in units of pR €o

A thick insulating spherical shell of inner radius a=1.2R and outer radius b=9.8R has a uniform charge density p. PR, What is the magnitude of the electric field at r=3.5 R ? Express your answer using one decimal place in units of €0

Consider the symmetrically arranged charges in the figure, in which qa 9b = -2.45 µC and q. = qd = +2.45 µC. Determine the direction of the electric field at the location of charge q. O right up and left down and left up and right dn down left down and right Calculate the magnitude of the electric field E at the location of q given that the square is 6.35 cm on a side.