A2 Physics | Questions and Doubts [Post Here]

[sweetjinnah]

i dont.

Oohh:/

 

[boxfire1995]

Thank you!

 

[sweetjinnah]

Can sm1 tell me O/n 2006 Q7 b)http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_w06_qp_4.pdf
nd M/J 2002 Q6 a) http://freeexampapers.com/index.php... Level/Physics/CIE/2002 Jun/9702_s02_qp_4.pdf

 

[-rimsa]

nd M/J 2002 Q6 a) http://freeexampapers.com/index.php/directory/download?location=A Level/Physics/CIE/2002 Jun/9702_s02_qp_4.pdf

MJ 2002 Q6
Magnetic flux linkage graph will be same as current graph, and induced emf graph is So the magnetic field and induced emf are 90° or π/2 radians out of phase.

 

[unique111]

MJ 2002 Q6
Magnetic flux linkage graph will be same as current graph, and induced emf graph is So the magnetic field and induced emf are 90° or π/2 radians out of phase.

Could you draw it and post it, please?

 

[goodluckayesha]

Plz someone explain these quickly thnx in advance........

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s04_qp_4.pdf for 5ci how is the ratio 2 i get the formula but im not getting the answer and for 5dii why is the rms 3A?

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w02_qp_4.pdf 2b which is actually a really easy question but im confused it would be really helpful if someone provides a drawn n labelled diagram

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w04_qp_4.pdf can anyone solve 6c with steps i cant get thru

 

[Monojit Saha]

Someone please explain to me the absorption line spectra and emission line spectra. Please

Okay so firstly emission light spectrum is in case of hot gases whereas the absorption line spectrum is in case of cool gases.
Emission line spectrum:
In hot gases, the electrons have already gained the energy gap difference between successive levels and thus gradually are losing that energy when the electrons come back to the ground state. Thus we get certain wavelengths of light emitted depending on the energy gap. Thus, analyzing these spctrum can give us an idea about the electron levels of the element that is emitting.
For absorption line spectrum:
In cool gases, when white light is passed, the screen will have a few dark fringes as some wavelength of light is absorbed by the cool gas. The gas then uses this to excite its electron to a higher energy level.

 

[Yousef123]

i need a help in j/2002 q6 (b) ii please