Recent content by sdfsfasdfasf

Been stuck on this one for a while now. Base case is easy, n=1, we have x <=1/3, so trivially 1-x>= 2/3 and we are done. The issue is with the inductive step, I don't know how to use the hint, infact I am struggling to understand what is meant by the hint. Any help (or a full solution) would...

No interference

As an A Level student we don't learn about the actual fields that make up an electromagnetic wave, but this makes enough sense to me, the anaolgy of a phase shift of pi makes the most sense. Thank you all

Ok, do the maxmima / minima flip? If so why?

If im understanding correctly after 180 degrees the waves emitted are "upside down" so the maxima / minima are reversed on the intereference pattern?

I am struggling to visusalise what you mean when you say rotate about its axis, can you draw a picture please?

Does your answer agree with kurumans answer?

# I am confued with what is meant when it says "about the line AB", does this mean horizontally or vertically? The question states that the sources produce vertically polarised microwaves (I know this is relavant) and I also know that waves moving in different planes cannot interfere. Does it...

I agree its a correct statement, however my interpretation (incorrect) was that "links to" refers to increasing flux exclusively. When we cut the current, that reduces the flux present right?

My confusion was around the phrase "links to", if instead we use "flux in A is linked to B" that makes a lot more sense to me. I was misunderstanding and thought "links to" had something to do with increasing flux, when it dosesn't. Thank you Steve.

I wasn't answering the question in my post! I just wanted to know what is meant by the phrase "links to", and it seems that its a little more complicated than expected, could you talk about it a little more, particularly the bit where you said "this is always true". How can we distinguish this...

Initially the current is non-zero therefore we have a magnetic field present, and at the end there is no current therefore there is no magnetic field present. When we open the switch, and the current drops to 0, there is a change in the magnetic flux of B, as the field from A has gone. This...

OCR A was a difficult paper but I think I did good, if I just focus on paper 2 and 3 I should be able to get my A*. Further Maths was surprisingly easy however, so unsure what the 2nd paper will look like for that.

Yeah I looked it up and found a higher level equation that uses some fancy Reynolds number (proportional to density) and the density term itself, thereby showing that the drag decreases by a greater factor than the thrust (for a given velocity) if you decrease the density, thereby showing the...

I don't know what you mean by that, my specification does not reference the specifics. I have an exam tomorrow and I'd like to get this sorted, do you have any reading information or could you kindly tell me the answer? Thank you