Physics: Post your doubts here!

[shinnyyy]

Wkhan860 here's the first one

 

[shinnyyy]

Wkhan860

 

[shinnyyy]

Wkhan860 and can you please explain me what's this eV bcoz there are so many questions in new papers and I don't how to solve them as I haven't been taught this thing by my sir.

 

[Wkhan860]

View attachment 55361
Wkhan860 here's the first one

Year bhi batao dono qtns ke

 

[Wkhan860]

Wkhan860 and can you please explain me what's this eV bcoz there are so many questions in new papers and I don't how to solve them as I haven't been taught this thing by my sir.

1eV=(1.6*10^-19) J
Its a unit of energy

 

[shinnyyy]

Year bhi batao dono qtns ke

Its oct/nov 09 var is 11.

 

[shinnyyy]

H

1eV=(1.6*10^-19) J
Its a unit of energy

How can a voltage thing be equal to energy.
there's no article regarding that in Cambridge endosed book.

 

[Wkhan860]

View attachment 55361
Wkhan860 here's the first one

As the collision Is elastic.....both masses wont stick nd move in oppoaite directions after collisions
Furthermore the relative speed of approach shuld be equal to relative speed of seperation whch is satisfied by opt A
thus ans is A

 

[Wkhan860]

H

How can a voltage thing be equal to energy.
there's no article regarding that in Cambridge endosed book.

Its a new addition to syllabus I reckon
Its the energy an electron gains when accelarated by 1 V of pd

 

[shinnyyy]

As the collision Is elastic.....both masses wont stick nd move in oppoaite directions after collisions
Furthermore the relative speed of approach shuld be equal to relative speed of seperation whch is satisfied by opt A
thus ans is A

Can you plx solve and post the written solution here on the thread?
Bcoz I didn't get the second part of it which you have explained.

 

[shinnyyy]

Its a new addition to syllabus I reckon
Its the energy an electron gains when accelarated by 1 V of pd

I'm sorry I didn't get it
If you have any article regarding that then plx lemme know bout that.

 

[Wkhan860]

Can you plx solve and post the written solution here on the thread?
Bcoz I didn't get the second part of it which you have explained.

 

[Wkhan860]

I'm sorry I didn't get it
If you have any article regarding that then plx lemme know bout that.

Im srry but I hav only dis much
As far as I hav dn qtns related to eV...its just abt conversion of energy into eV
nd for tht I hage told u the value

 

[shinnyyy]

View attachment 55363

How did you make it as 5/3 and 1/3 . And why do we revert the signs while doing momentum calculations?
And ty

 

[shinnyyy]

Im srry but I hav only dis much
As far as I hav dn qtns related to eV...its just abt conversion of energy into eV
nd for tht I hage told u the value

Okhay
I have seen that value in the question paper as well but the point is idk how to use and cz of this I'm losing straight forwards 3 marks for all these calculations.

 

[Wkhan860]

Okhay
I have seen that value in the question paper as well but the point is idk how to use and cz of this I'm losing straight forwards 3 marks for all these calculations.

Send me a qtn related to tht nd Ill tell u how to deal wid it

 

[Wkhan860]

How did you make it as 5/3 and1/3 . And why do we revert the signs while doing momentum calculations?
And ty

5/3 nd 1/3 are their speeds after collision as given In opt A
Lol....my sir gav a long explanation abt whn to xhange signs nd when not to...ill try to snd u asap

 

[Wkhan860]

View attachment 55362Wkhan860

 

[Wkhan860]

View attachment 5532Wkhan860

Here we used Sin90 cux we hav to find all orders md multiplied It by 2, to fimd orders on either side of zero line

 

[shinnyyy]

Send me a qtn related to tht nd Ill tell u how to deal wid it

I'll send you tomorrow okhay?