Physics paper 4 helpp!!

[usamah2702]

can someone please help me in physics paper 4 questiion
mayjune 2005 part (b) (i), (ii) and (iii)
please help, i dont understand the graphs.

 

[usamah2702]

may june 2005 question 6 part B) i,ii and iii

 

[beacon_of_light]

magnetic flux is directly proportional to current ... so in b)i) the curve would be same as of magnetic flux ...
Emf is the rate of change of magnetic flux... i.e. it is the gradient of Φ and t graph ... so it will be a cosine curve...

b)iii) when current is zero, emf is maximum ...and when current is maximum, emf is zero... total wave is 2 π radians... 1/4th would be π /2 ...

 

[usamah2702]

ok i got part ii and iii but can u explain how is current proportional to magnetic flux?
is there a formula?
thanxx

 

[ammarelahi]

shouldnt the graph of emf be of -cos as emf= -rate of change of magnetic flux ??

 

[workinghard]

doesn't it hv somethin 2 do wid faradays law of magnetism induced current is directly propotional 2 rate of change of flux???
xorrect me if i m wrong kindly!

 

[princesszahra]

ok i got part ii and iii but can u explain how is current proportional to magnetic flux?
is there a formula?
thanxx

the forumla opposes this statement of yours
but only faraday's law proves ur statement