Physics: Post your doubts here!

[Zaki ali asghar]

i think this is from W08

 

[Zaki ali asghar]

is photon a quantum/packet of energy of an electromagnetic wave right for 2 marks?

 

[haithsoul]

guys you should mention that part of the out put VOLTAGE is fed back not just output thats inaccurate

 

[Zaki ali asghar]

guys you should mention that part of the out put VOLTAGE is fed back not just output thats inaccurate

the mark scheme mentions output in brackets so i think it's fine without it too

 

[haithsoul]

the mark scheme mentions output in brackets so i think it's fine without it too

but always stresses on voltage, you must mention that it is the voltage that is fed back not just output

 

[Zaki ali asghar]

yeah voltage has to be mentioned.

 

[haithsoul]

btw for the trolly amplitude reducing what did you mention to gain 3 marks?

 

[anastasia grey113]

but always stresses on voltage, you must mention that it is the voltage that is fed back not just output

well Vout means output voltage

 

[Tauqir_hamed]

is photon a quantum/packet of energy of an electromagnetic wave right for 2 marks?

could be..
But I wrote in the second line E = hf as well. just to be safe

 

[anastasia grey113]

yeah voltage has to be mentioned.

i wrote Vout

 

[haithsoul]

yeah voltage has to be mentioned.

how many marks were there for the amplifier question? my dumbass put gain 8 instead of 9 almost killed myself

 

[Zaki ali asghar]

i think 1 for the gain and 2,2 marks for the following parts but u'll get the ecf

 

[anastasia grey113]

is photon a quantum/packet of energy of an electromagnetic wave right for 2 marks?

i think for 2 marks thaz correct
if it had been for 3 than E=hf also had to be mentioned

 

[Zaki ali asghar]

i think for 2 marks thaz correct
if it had been for 3 than E=hf also had to be mentioned

yeah just checked the W08 MS, one mark is for quantum/packet of energy and second one for of electromagnetic wave

 

[haithsoul]

whta

i think for 2 marks thaz correct
if it had been for 3 than E=hf also had to be mentioned

what was the latent heat of fusion of ice? was it 400 something?

 

[Tauqir_hamed]

whta


what was the latent heat of fusion of ice? was it 400 something?

its 300 sth i believe

 

[anastasia grey113]

whta


what was the latent heat of fusion of ice? was it 400 something?

it was in 300s

 

[haithsoul]

its 300 sth i believe

dont scare me man we just had to use e=ml right?

 

[haithsoul]

we just substitute values given right?

 

[anastasia grey113]

NO THIS CANT BE
THE THRESHOLD CANT GO ABOVE 55 I THINK
I mean v got As in AS n v all made a lot of mistakes n there must b many v dont know of
i think listening to just a few nerds saying the paper is easy is not the right thing were doing