Field Theory Answers

Compute the electric potential from a source charge of -2.33 ×10^-13 C if a test charge is 6.45 × 10^-15m away from it

An insulating sphere has radius R and uniform volume charge density ρ. Calculate the electric field at the point P which is inside (r < R) and outside (r > R) of the sphere by using Gauss’s law. Here r is the distance between the center of the sphere and the point P. (b) Discuss the possibility of choosing Gaussian surface other than the sphere. For instance what if you choose the cylindrical surface as a Gaussian surface, is it possible to use Gauss’s law in order to calculate the electric field of a charged sphere? Explain your answer in detail. 

Math / Physics Problem Solver

A negatively charged droplet of mass 4.5x10 -3ng remains balanced in the electric field between parallel horizontal plates which are 10mm apart if the potentional difference between the plates is 1000 V calculate the charge on the droplet (g =9.8 -2)

Three masses are located in the corners of an equillateral triangle. Find the magnitude and direction graitational field at the center of the triangle. Given:m1=22, m2=340,m3=340

A 0.2C charge is moved in an electric field from a point with a potential of 20V to another point with a potential of 80V. How much work was done to move this charge?

Use Gauss’ Law to calculate the electric field due to an infinite non-conducting sheet of charge, with surface charge density 

Use Gauss’ Law to calculate the electric field due to a long line of charge, with linear charge density 

What is the electric flux through the disk of radius r = 0.1m if the uniform electric field has

a magnitude E = 2x103 N/C? What is the flux when the disk is perpendicular to the E? What is the flux when the disk is parallel to the E?

In the following figure, a rod of Length L=8cm has negative charge q = -4fC uniformly

distributed along its length. a) What is the linear charge density of the rod? b) What are the

magnitude and direction of the electric field produced at point P, at a distance d = 10cm from the rod?

A point charge Q1 = 10C is at the origin, and a second charge Q2 = -5C is placed on the y￾axis at y = 1m. What is the total electric field at the point P with coordinates x=2m, y=1m?