Electricity and Magnetism Answers

Four electrons are situated at the corners of a rectangle (l=4m; w=2m). Find the resultant force electron A will experience dur to the charges at the other corners of the triangle. The green circle below represents electron A.

Find the electric flux through the left and right sides of an equilateral triangular prism of side 2.00 m when placed in a horizontal unform electric field of 5.0 N/C directed to the right.

A dielectric object is placed in an electric field. The object becomes polarised and 

a large number of atomic/molecular dipoles in the object align in the direction of 

the applied electric field. Derive an expression for the electric potential due to this 

polarised dielectric at a point outside the dielectric.

Assume a point charge Q1 is at x=0 and a charge Q2 is at x= d. What is the relationship between these charges if the resulting electric field is zero at the following points:

a) x= d/2; b) x= 2d; c) x= -d/2

The equation y = 5Sin (3x -4t), where y is in millimetres, x is in metres and t is in seconds represents a wave motion. Determine the frequency of the wave

A conducting cylinder of radius 3.25 cm and length 5.6 cm has a total charge of 5.5 x 10^-9 C distributed uniformly on its surface area. Find for the potential at its surface.

What are the particles responsible for transferring electrical energy from a cell, through conducting wires in an electric circuit?

What is the magnitude of the electric field at a distance of 1.5m from a point charge with q=3.5C?

We assume the existence of a uniform electric field E= 500 i N/C without specifying which charges are the source. To this field is added that of a point charge of 2 uc located at the origin. What is the resultant electric force acting on a charge of 5 uc located at the point (3m,4m)?

The answer is (4.66i + 2.88j)x10^-3 N but I'm not sure how they got it?

There is a point charge Q1 at x= 0 and a charge Q2 at x=d. What is the relationship between these charges if the resulting electric field is zero at the following points: a) x= d/2 b) x= 2d c) x= -d/2?