Edexcel PHY3 Practical

Yeah, it shouldn't matter what anyone says. You need to be on track with everything anyway!

Reply 27

yea..i hav a feeling that they might throw in some potential divider questions

Reply 28

hasnain721

yea..i hav a feeling that they might throw in some potential divider questions

You never know. Make sure you know everything on it. You should know it anyway for your other physics papers.

Reply 29

in the paper which says : May 2004 Cp 1 , page 6.

I got delta thetha as -10 degrees C and k = 1 for part b and c . Is that right?

Reply 30

Delta theta cant be minus.

Reply 31

Kalashnikov

Delta theta cant be minus.

on the paper it says thetha initial = 85.0 degrees C and thetha final = 75.0 degrees C. Hence Detal thetha = 75-85 = -10 degrees C

Reply 32

hasnain721

on the paper it says thetha initial = 85.0 degrees C and thetha final = 75.0 degrees C. Hence Detal thetha = 75-85 = -10 degrees C

Delta means "change", you just need the difference in the two values. It asks you to calculate the fall in temperature. It has fallen by 10 degrees not by -10 degrees.

Reply 33

Kalashnikov

Delta means "change", you just need the difference in the two values. It asks you to calculate the fall in temperature. It has fallen by 10 degrees not by -10 degrees.

oohhh. Ic

Any ways even if u use +10degrees C as the change, i am gettin k= -1 in both part b) as c)

as
delta thetha = k(thetha final - thetha initial)

10 = k(-10)

therefore k = -1

this is the same for part c.

And then part d says determine the percentage difference between your two values of k. I cant do that coz both the values of k that i got are -1 !

Reply 34

gypsieking

3

No whoring
Do not give reputation to another member for no reason because of a promise of reciprocation

please pay attention to this

Reply 35

Wait wait, how are you getting that? You don't subtract theta initial, you subtract 18.5. Look at the formula carefully.

Reply 36

Kalashnikov

Wait wait, how are you getting that? You don't subtract theta initial, you subtract 18.5. Look at the formula carefully.

ohhh..i feel like an idiot now lol!

thanks a lot mate!

I also dun get this question on page 4 (same paper)

Explain carefully which of the circuits is the one you tested - I have no idea!

Reply 37

hasnain721

ohhh..i feel like an idiot now lol!

thanks a lot mate!

I also dun get this question on page 4 (same paper)

Explain carefully which of the circuits is the one you tested - I have no idea!

Okay, first you need to calculate the resistances for both connections. Then what you do is look at the three circuits, but imagine them being connected X to B and Y to A. When this is the case, wherever you see a diode, there will be no current in that part of the circuit.

Work out the total resistance for each circuit and see which one matches the resistance value you calculated for X to B and Y to A.

Reply 38

lola17

hey, im doing the edexcel AS physics practical exam tommorow but i have NO IDEA what to revise! can someone please help me?

Reply 39