Physics: Post your doubts here!

[LonelyStudent]

That question that asked you to draw the diagrams of combined capacitance, what were the capacitances they wanted again? I know we had 3 9F capacitors.

 

[Zaki ali asghar]

4 and 6 i think

 

[chichibung]

was paper 42 easy? should i expect paper 41 to be easy or hard?

 

[LonelyStudent]

42 wasn’t so bad. I would suggest you revise Band Theory just to be safe though. That’s the one that didn’t come in 42 at all, so it WILL come in 41, probably.

 

[khanzari]

wth was that thermal question

 

[haithsoul]

wth was that thermal question

what value did you get for the last part of the question?

 

[amina1300]

wth was that thermal question

how were we supposed to get the kinetic energy?!?

 

[amina1300]

That question that asked you to draw the diagrams of combined capacitance, what were the capacitances they wanted again? I know we had 3 9F capacitors.

They wanted us to draw 9uF and 4uF how ?!

 

[haithsoul]

They wanted us to draw 9uF and 4uF how ?!

you had to draw them in paraller or series.
4 was if i remember two parallel and one series
9 was two series and then those two are in parallel with the other one.

 

[haithsoul]

w

how were we supposed to get the kinetic energy?!?

hat did you get here? for final T

 

[Mts.99]

what was the answer to question on frequency modulated waves?

 

[haithsoul]

what was the answer to question on frequency modulated waves?

amplitude unchanged so 5V
for max and min freq you just multiply the V of signal by deviation and add it and subtract to the carrier frequency. i dont remember exact values.

 

[Mts.99]

amplitude unchanged so 5V
for max and min freq you just multiply the V of signal by deviation and add it and subtract to the carrier frequency. i dont remember exact values.

so we had to subtract and add 8khz to 650KHZ?

 

[haithsoul]

y

so we had to subtract and add 8khz to 650KHZ?

you have to multiply it by the voltage of signal wave. you had 8KHz per volt so myltiplu by 3( i think it was) and add for max and minues for min

 

[anastasia grey113]

y

you have to multiply it by the voltage of signal wave. you had 8KHz per volt so myltiplu by 3( i think it was) and add for max and minues for min

lol i dont remember the answers to this
but yes thats wut u had to do lol

 

[haithsoul]

lol i dont remember the answers to this
but yes thats wut u had to do lol

what was your answer for the final temperature of the ideal gas question?

 

[anastasia grey113]

what was your answer for the final temperature of the ideal gas question?

517 K
wbu?

 

[haithsoul]

y

517 K
wbu?

same i think it was 500 something

 

[haithsoul]

what

517 K
wbu?

about reason for the trolly amplitude decreasing?

 

[anastasia grey113]

what

about reason for the trolly amplitude decreasing?

well it was friction between the tyres and floor so it decreased since mechanical energy was being converted to heat
wut did u write?