Understanding Law of Poles (Electric)

AI Thread Summary
The discussion centers around the "law of poles" in electricity, which is interpreted as stating that like charges repel and opposite charges attract. There is confusion regarding the phrasing of the question, with suggestions that it may be a typographical error. The poster expresses uncertainty about the term "law of poles," noting that it is not commonly found in physics textbooks. They speculate that it could refer to Gauss's law or possibly be a misinterpretation related to legal terminology in Poland. The conversation highlights the need for clarification on the term as it pertains to the physics final exam.
Ithryndil
Messages
142
Reaction score
0

Homework Statement


The question is this:

State the law of poles (electric) states

Homework Equations


The Attempt at a Solution


Ok, so I assume it's a typo above...and should read either:
1. State the law of poles (electric)
or
2. The law of poles (electric) states.

That is the question I am given. I feel it is important to say that this is a question on my physics final which my teacher made a take home final. That being said, I have already answered it such "Like charges repel and opposite charges attract." I have absolutely no intention of changing it if my answer proves wrong, however I am curious as to what exactly the question is getting at (couldn't find anything directly online). Thanks!

Edit: I completely understand if you don't wish to answer this question (I turn the final in tomorrow).
 
Physics news on Phys.org
I taught physics for several decades from a variety of textbooks but I never came across the "law of poles" (electric). It may be (a) an outré sobriquet for Gauss's law or (b) related to the following item that I found in Wikipedia: "The supreme law in Poland is the Constitution of Poland. Poland is a civil law legal jurisdiction and has a civil code, the Civil Code of Poland. The Polish parliament creates legislation (law) and is made up of the 'Senate' (upper house) and the Sejm (lower house)." Although (b) is the law that all Poles are expected to obey, it is highly unlikely that it would be the subject of a physics exam question. My vote is for (a).
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
Back
Top