Qualification > Sciences
ALL CIE PHYSICS DOUBTS HERE !!!
SkyPilotage:
yes 420 m i.e 2 s.f since the information given in the question is 2 s.f...
Since , 3 s.f are not used in the question. Dont use it, but Im not sure if they will deduct marks or not.
Naruto123:
http://www.xtremepapers.com/papers/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20%289702%29/9702_s05_qp_4.pdf
question 6b why is it 90 degrees
Can any1 summarize all the graphs for primary current voltage flux and secondary flux current voltage .
Ghost Of Highbury:
Well, this isn't much of a summary but remember this.
The flux changes according to the current, so same shape.
But you know, the field strength = -potentiala gradient of the flux.
Or E = d(flux)/dt (faraday's law)
so if the shape of the flux against time is like a sine curve. d/dt (sin t) = cos t.
So the E will be like a cos t starting from (0,1)
And as you know the phase difference b/w sine and cos curve is 90 degrees.
Ghost Of Highbury:
Summer 2007, question 10a)
At t=0, will the signal be 0 or 2?
question 7b)
Why does the damping decrease when the resistance increases?
SkyPilotage:
--- Quote from: Ghost Of Highbury on May 13, 2012, 10:19:56 am ---Summer 2007, question 10a)
At t=0, will the signal be 0 or 2?
question 7b)
Why does the damping decrease when the resistance increases?
--- End quote ---
How are you studying for paper 5?
Are you studying experiments? cz I dont know where to find them :S
Didnt go into school labs .. soo If you could share some resources I would appreciate it!
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