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Ok cool thanks :) "if it is talking about the change in GPE" - what do u mean by this wrx ? can u pls give an example? Thanks

if they ask us to calculate this for an object.... using the formula E = - G m1 m2 -------------- r then do we leave the answer as a negative?

" but u can take flux as having some kind of "direction" and having negative flux enables u to have negative gradient in a flux-time graph which sorta simplifies things because you can then say that the EMF is the gradient of the tangent to the curve." ummm sorry abt this confusion...but...

are u sure....cause in our catholic trial (CSSA 2004) - (sorry dont have a scanner) A coil is rotated in an area of constant magnetic flux density. which graph represents the variation of MAGNETIC FLUX as the coil rotates, question 10 in the multiple choice - i put the answer as D(mod of a...

Completely understand it now! Thanks! but just one last question :p for the Flux graph - (sine) - would there be difference for AC or DC (i mean would it be an absolute value graph for DC)? Thank you

ahhh i see now... so wherever a current is produced....there will also be an emf. so for a DC generator, it would also be the same graph yeah? or would everything be positive?

yeah i thought the answer is A But it says the answer is B...so i dont understand Pls explain? Thanks

Hey I would have thought that the induced emf would be max, when there is greatest change in flux....at point Q ( i thought the answer is A) pls explain? Also, for the same question, if we were asked to draw graphs of the current against position, flux against position, torque against...

in the formula.... T^2 / R ^3 = 4pi^ / GM is R, the ORIBITAL radius? or just the radius of the planet??

1. HSC 2003 Multiple choice q14 2. just want to confirm this regarding circuits In series : the voltages of the components should add up to give the main voltage? and the currents remain the same for all the components right? Also, what happens to the resistances? In parallel : the...

ahh i see....so when u said UP u meant out of the page yeah? so instead if the question said...INCREASING the magnetic field instead of reducing.... then according to Lenz's law, the field will point into the page and the current will flow clockwise right? Thanks

Thanks a lot for ur help guys! But just two questions regarding ur explanation Jase, "23. This is using the right hand GRIP rule. You know that solenoid thing? with the fingers wrapped around the bunch of coils to find the North pole. This is the same thing. As the magnet moves in... the...

Hey i have a few questions from this chapter in success one......especially the ones with the diagrams! ( i dont have a scanner) sorry could u guys plss explain the following questions in multiple choice : 1 2 6 (how can u tell which is positive? and whether it slows down or not?)...

sorry for the confusion... so the answer in the book is wrong?

no the velocity is the gradient of the graph x = v t

ummmm i got it from success one. That was what the answer said :s

Yeah thats what i thought....shorter wavelength => higher frequency ok..the answer says the frequency of the light has increased and this means that the energy of each photon is larger. the new beam will liberate photoelectrons with a greater maximum kinetic energy BUT because the...

so for the HSC q14 If we were to draw graphs... i would think that the graph for diagram X - would be a straight line - as you guys said the field is always perp. What would the graph for Diagram Y look like? Thanks

this is from the success one book- q 8, But i dont really understand the answer. i know that the intensity of light is proportional to the number of electrons... ------------------------------------------------------------------------------------------------ During an exp, a beam of uv...

Cheers! Thanks!