Recent content by Dousin12

<Moderator's note: Moved from a technical forum and thus no template.> Question: A certain amount of oil on the sea surface can be considered as circular form and the same thickness throughout its surface. At a certain time, the following are noted Data: Oil is supplied to the spot at 5m^3/min...

So this is how i think. 1. The Magnetic flux increases linerarly since A has the shape of a Square. (when A enter) 2. Inside the Flux won't change. 3. When it leaves. the flux decreases linearly First of all. IM here very unsure if the word "increase" and "decrease" is correct in 1 and 3...

So I think that when the current is turned on. There will be a induced magnetic field created due to chane in magnetic flux over a short amount of time. Thus according to Lenz law it will be the opposite direction of what is created when the current is turned on ("in" the metal ring, drawn in...

Thanks for the replies guys, this was what i was thinking. That it might jump when u turn it on. But not when u turn it off. I wrote my explanations. But how should i explain it using "South repel South" and "north repel north" etc..?

But i could say counterclockwise is positive and thus the current would start at positive?

Homework Statement http://imgur.com/a/7CUcU What happens when you close W? What happens when you open W again at Q? If there is a ring of metal at Q, on the coil. Homework Equations There is no relevant equations in this case. The Attempt at a Solution North will be on top and south on the...

So if I is constant, will I be positive or "negative" at the start? so to speak.

Does the magnetic flux increase linearly when u put it in with as a square? Why is it lineraly, since the velocity is constant right? Thus the emf will be constant and thus I is constant. However, is delta flux positive or negative? This affects sign of emf? And i said in the beginning I is...

But how can i transfer emf(t) to I(t) i see no resistance.

Okay when i figure out graph for flux and emf. How can i find graph of I? Whats the relation between a emf and I graph. E.g. if emf= 2*t What would the I graph be?

1. Seriously i don't know if emf is constant or changes. I haven't learned tbh. SO i don't know if emf is linear or not etc... 2. The I is 0 coz the flux dosent change thus the emf is 0 and that means no current? Or is there a better way to explain why I is 0 inbetween? 3. So if emf is linear...

http://imgur.com/a/czmiF Yes the FLux is not changing when its inside, hence the current should be 0? How about question 2 and how should i start the graph?

Homework Statement The figure shows a metal coil labored as A. Heading torwards a region where a uniform static magnet field exists, poiting torwards the ground (hence X). The coil moves with the same constant velocity. As it enter the magnet field the coil will have an induced current in it...

Im doing a proof. For instance all sums of a triangle add upp to 180 degrees. But how to i motivate that all arcs on a circle add up to 360 degrees. A part of my proof is that Arc A + B + C = 360 degrees. But i don't know what to write in the column that motivates every step. ! Like a lap is...

Yes I am really sorry, but have u read what i wrote! 11g/Molar mass ob PbCl2=0.04 moles/dm^3 <=> 0.04 moles/dm^3 Pb2+ <=> 0.08 Moles/dm^3 Cl-' 11g is the mass of PbCl2 that is saturated! (per dm^3)