Physics 41...How'd it go?

[solidboy123]

yeah it was 4 and the rms was 2.83

And to calculate resistance we had to use voltage value as 4 or what???

 

[larina]

And to calculate resistance we had to use voltage value as 4 or what???

yeah i used 4 cuz it didnt ask for mean resistance or something

 

[solidboy123]

ohhhhhhhhhhhhh, i forgot to do thatttt, i just wrote the value for lamda!!! :'(

No problemo u will get 2 marks

 

[solidboy123]

yeah i used 4 cuz it didnt ask for mean resistance or something

Oh ok fine and any idea for threshold of A

 

[Otaiba13]

Guys to calculate the resistance what did u use for V

 

[larina]

Guys to calculate the resistance what did u use for V

4

 

[Otaiba13]

And how were we supposed to derive the equation for ideal gases :/ i just took the average of square speeds and divided by 3!!

 

[solidboy123]

Guys to calculate the resistance what did u use for V

I used 4 what did u use???

 

[larina]

Oh ok fine and any idea for threshold of A

around 60 for A* maybe and 55-58 for A

 

[solidboy123]

around 60 for A* maybe and 55-58 for A

Hmmm i suppose

 

[Otaiba13]

Why 4 i did it with 4 then since we were using average current i redid it with average voltage V=4+2.4 /2 = 3.2!!
ahh well hope ill get a mark!!

 

[larina]

And how were we supposed to derive the equation for ideal gases :/ i just took the average of square speeds and divided by 3!!

there were 3 components x,y,z...the atom or watever was moving in x direction which is 1 of the 3 compoents so 1/3Nm<c2>

 

[larina]

Hmmm i suppose

and what about the current, i got it as 1.1*10^-3 i used rms voltage*capacitance divided by 0.013s?!

 

[Otaiba13]

there were 3 components x,y,z...the atom or watever was moving in x direction which is 1 of the 3 compoents so 1/3Nm<c2>

yeah i wrote since we had to consider three dimensions of motion we have to divide by 3
overall the paper was tough but alhamdulilah went well!!

 

[larina]

yeah i wrote since we had to consider three dimensions of motion we have to divide by 3
overall the paper was tough but alhamdulilah went well!!

yes Alhumdulillah!!
how did u get the value for current?

 

[solidboy123]

and what about the current, i got it as 1.1*10^-3 i used rms voltage*capacitance divided by 0.013s?!

I got it as peak voltage*capacitence divide by 17 ms

 

[Otaiba13]

and for the r.m.s speed when we consider the temp do we have to consider in K or ^oC my rms speed was coming i think 580 or something!!

 

[solidboy123]

and for the r.m.s speed when we consider the temp do we have to consider in K or ^oC my rms speed was coming i think 580 or something!!

Exactly

 

[Otaiba13]

yes Alhumdulillah!!
how did u get the value for current?

I = Q/t
Q we calculated and t= 7x10^-3
because the current only flows while the capacitor is discharging!!

 

[larina]

I got it as peak voltage*capacitence divide by 17 ms

but i used 13ms