Recent content by kakadas

Homework Statement A DC is flowing through a conductor LK. Homework Equations Will there be a current in the frame ABCD, when: a) The current in LK will be switched on and off. b) The frame will not move relative to the conductor LK. c) The frame will be dragged to the...

There's no mention of any outside magnetic field. So I'm assuming the ring's magnetic field is creating the Moment.

Homework Statement A 20 A current is flowing through a ring. Ring's diameter is 30 cm. What is the value of the Moment that is affecting the ring? Homework Equations The Attempt at a Solution

So, no one can crack this? I'm sure this is solvable, i just lack the knowledge abut the lines of a magnetic field.. Anyone?

Homework Statement Homework Equations Where are the north and south poles of this magnet? Where are the north and south poles of the wire's magnetic field? The Attempt at a Solution I used the Right hand rule to determine the magnetic field of the wire, but I got confused when trying to...

I Just want to clearinfy that By telling that the switch is ON I meant that it's CONDUCTING. OFF means that it's open and NOT CONDUCTING.

Why is that so, please explain in more detail? BTW does it make a difference if the current is DC or AC? In my case it's DC.

That was exactly what i meant to say.. But does the current not flow when the switch is off? I think it still flows, because IMO the resistors are connected in parallel, so I think that the current flows either way, no matter in what state the switch is. If I'm wrong, Could anyone prove to...

I'm 100% sure of that. I will upload a scan ASAP. Oh I think I forgot to mention a crucial part of this chain (Or maybe not, I'm just learning..): It's connected to a battery, thus the current is direct. EDIT: Well maybe You're a bit confused because English is not my native language, so...

Well the book says exactly that. In my view this is reasonable because only some electricity is flowing through the switch when it's on, not all of it... Anyway, does anyone has the answer to my original questions?

Homework Statement EDIT: The chain is connected to a battery, thus the current in this chain is direct. When the electric chain's switch (J) is on, resistance [SIZE="4"]R[SIZE="2"]ab (from dots A to B) is equal to 80 Ohms. What is the electric chain's resistance when the switch (J) is off...

Yeah, that last question wasn't necessary for me. Now I don't know why I even bothered to ask it everything's clear here... Oh and Thanks for the help.

Homework Statement Original: Redrawn: Homework Equations Is the electric scheme correctly redrawn? Which of the resistors are in parallel and which are in series? The Attempt at a Solution

Because I didn't know how those 4 parallel capacitors' sum will look like in the drawing... Say I use the old drawing: Could Anyone tell me How will it look like after summing those 4 parallel capacitors? This?: OR maybe This?: oh, and Please explain Your choice.

Homework Statement Find the sum value of capacitors. Homework Equations The Attempt at a Solution I tried to redraw the scheme like in the picture below, but my teacher told me it's not correctly redrawn. I hope You'll prove to me that my redrawn scheme is correct... If not I'm more than...