What is the net electric field? - Socratic
2017年8月7日 · The electric field of a point charge is given by:. #vecE=kabs(q)/r^2# where #k# is the electrostatic constant, #q# is the magnitude of the charge, and #r# is the radius from the charge to the specified point
The Electric Field - Physics - Socratic
2014年5月17日 · A force field is a way to picture the effects that electric charges have on one another. Instead of talking about the force that a positive charge exerts on an electron, we can say the charge creates a force "field" in the empty space around it. An electron put down at any place in this force field is pulled towards the positive charge; a positive charge set down at the same …
Why is the electric field inside a conductor zero? - Socratic
2014年7月19日 · Another question might involve the application of an electric field OUTSIDE the shere. If this were to occur, say an external positive charge were placed in close proximity to the sphere, the electrons on the surface of the sphere would rearrange themselves, fleeing the positive charge and setting up an new electric field inside the container ...
How does an electric field affect the movement of a charge?
2014年6月22日 · The electric field will exert a force that accelerates the charged particle. The electric field has a direction, positive to negative. This is the direction that the electric field will cause a positive charge to accelerate. If a positive charge is moving in the same direction as the electric field vector the particle's velocity will increase.
How does electric field relate to voltage? - Socratic
2015年5月14日 · The magnitude of the Electric field(#E#) can also be viewed as being the negative of the Potential gradient #((dV)/(dr))# So #" , "E=-(dV)/(dr) color(red)" {This is the relation i think}"# Because #NC^-1-=Vm^-1# where #V# in #(dV)/(dr)# is the Electric potential at the point under consideration,
Why do electric lines of force never cross? + Example - Socratic
2014年5月17日 · The short answer is if they did cross, they would represent a location with two different strong electric field vectors, something that can't exist in nature. Lines of force represent the strength of the electric field at any given point. Visually the denser we draw the lines, the stronger the field is. Electric field lines reveal information about the direction (and the strength) …
How does current relate to electric field? - Socratic
2015年6月3日 · Electric current is directly proportional to the voltage difference between the two terminals. We also are familiar with the fact that voltage difference between two points is also proportional to the electric field magnitude. This naturally implies that, current is proportional to the magnitude of electric field between the two points the current flows.
How does the strength of an object's electric field change with ...
2015年6月1日 · It depends on the source of the electric field. For a point charge, it reduces as 1/r^2 , if r is the distance from the charge. For a very long charged wire, it reduces as 1/r. But, for a very long thin sheet (charged), it is a constant i.e. it doesn't decrease with distance from the sheet. Electric fields generated by changing magnetic fields again have different properties. …
Electric Force - Physics - Socratic
To represent this field we would need all of the arrows facing towards the origin, with longer ones close to the surface and shorter ones as we move farther away. We can now replace our Earth with an electron and the field we drew for gravity would now represent the electric field surrounding the electron. A proton would be similar, but all of ...
How does permittivity affect electric field intensity?
2015年6月1日 · Permittivity determines how an electric field affects or is affected my some material medium. If the electric field in a space is E is vacuum and we put a a material medium with permittivity epsilon in that region, the electric field reduces by a factor of epsilon/(epsilon""_0) which is equal to the dielectric constant K""_D of the medium. Due to presence of the material …