physics paper 42 expected gt and discussion

[nighthawk]

Hey guys can we discuss chemistry paper 5 please.. as in question paper? Can anyone please help me with 2014 winter paper 52 question 2 (e,f) please? Thank you

 

[Omar Haider]

Hey guys can we discuss chemistry paper 5 please.. as in question paper? Can anyone please help me with 2014 winter paper 52 question 2 (e,f) please? Thank you

I replied in the other thread

 

[aka abdul]

You use the potential divider formula. For 121.5 ohms, the total voltage in the first segment is (121.5/121.5 + 120)*2000mV which gives you like 1006mV and then for the second part of the circuit (5000/5000+5000)*2000mV which gives you 1000mV. So 1006-1000 = 6mV

but the resistance of thermistor was 120 and increased by 121.5.so wont it be 121. + 120/341.5

 

[Omar Haider]

but the resistance of thermistor was 120 and increased by 121.5.so wont it be 121. + 120/341.5

Why would it be 341.5?

 

[maryam fatima]

M at the top right, not sure if that is correct. And pd was 6mV.

same value for pd but i marked lowest point with M, dont know why

 

[maryam fatima]

what was the answer to q11 part c, ratio P out/P in? i got the answer 1.62:/

 

[Ahmed Aqdam]

same value for pd but i marked lowest point with M, dont know why

I did too but then I changed it.

what was the answer to q11 part c, ratio P out/P in? i got the answer 1.62:/

Inverse to this, 0.618. Output can't be more than input as there was attenuation.

 

[maryam fatima]

I did too but then I changed it.

Inverse to this, 0.618. Output can't be more than input as there was attenuation.

2.09 was attenuation... 2.09=10log(out/in), wasn't this the method to find it?

 

[nighthawk]

maryam fatima You have missed out the - from the equation. It will be 2.09= -10log( out/in)

 

[Aly Emran]

2.09 was attenuation... 2.09=10log(out/in), wasn't this the method to find it?

You wrote the formula for Gain which is =10log(Pout/Pin)
For Attenuation, the formula is=10log(Pin/Pout)
See the difference...

 

[nighthawk]

Hey guys, anyone gave their computing exam? Computing 9691 paper 32. If yes, what is the gt you expect to be? Vote at this thread.

https://www.xtremepapers.com/community/threads/computing-9691-paper-32-2015-expected-gt.41556/