Field Theory Answers

What is the electric field strength at a point in space 4 m due east of a particle with a charge of +8 μC? What

is the direction of the field here?

A conducting sphere of radius 6.25 cm has a total charge of 10.50 x 10^(-9) C distributed uniformly on its surface area. Find the potential at (a) its surface, (b) any point inside the sphere, and (c) a distance of 5.0 cm from the center of the sphere. *

Three point charges are placed at the following points on the x-axis: +2 μC at x = 0, - 3 μC at x = 40 cm, - 5μC at x = 120 cm. 

1. Find the force on the - 3 μC charge
2. Find the force on the - 5 μC charge

. A square metal plate with a length of 0.20 m and with a charge of 9.7 x 10 -7 C.

Find the electric field of the square metal plate.

A particle has charge -3.00 nC.

a) Find the magnitude and direction of the electric field due to this particle at a point 0.250 m directly above it.

b) at what distance from this particle does its electric field have a magnitude of 12.0 N/C?

A +2.00 nC point charge is at the origin, and a second -5.00 nC point charge is on the x-axis at x= 0.800 m.

a) Find the electric field (magnitude and direction) at each of the following points on the x-axis: i) x= 0.200 m; ii) x= 1.20 m; iii) x= -0.200 m.

b) Find the net electric force that the two charges would exert on the electron placed at each point in part (a).

Point charge q1= -5.00 nC at the origin and point charge q2 = +3.00 nC is on the x-axis at x= 3.00 cm. Point P is on the y-axis at y= 4.00 cm. a) Calculate the electric fields Ē1 and Ē2 at point P due to the charges q1 and q2. Express your results in terms of unit vectors. Use the results of part (a) to obtain the resultant field at P, expressed in unit vector form.

one charge of +5.0μC is placed in air at exactly x=0, and a second charge +7.0C at x=100cm. Where can a third be placed so as to experience zero net force due to the other two

four equal point charge of +3.0Cμ are placed in air at the four corners of a square that is 40cm apart on a side. Find the force on any of the charge

Three charges are placed at the following locations on the xaxis:+2.0μC at x=0, -3.0μC at x=40cm, -5.0μC at x=120cm. Find (a) on the -3.0μC charge,(b) on the -5.0μC charge.