Physics: Post your doubts here!

[Thought blocker]

There is a formula for power, P=V^2/R. Since in the question they said that wire has constant resistance therefore power is proportional to voltage ^2

I still not getting it, anyways thank for help.

 

[biscuitbiscuit]

I still not getting it, anyways thank for help.

Sorry I couldn't help you. Is it the formula? Don't ask me to derive it because I really don't know! They are couple of formulae of power used in this chapter like Power= V^2/R, Power= VI and Power= I^2R. You do take maths, right? because this is something like ratio thing

 

[Thought blocker]

Sorry I couldn't help you. Is it the formula? Don't ask me to derive it because I really don't know! They are couple of formulae of power used in this chapter like Power= V^2/R, Power= VI and Power= I^2R. You do take maths, right? because this is something like ratio thing

Tell me What formula you used ? I mean Tell me what values you input in V^2/R ?

 

[Suchal Riaz]

yup

Do you want me to explain?

 

[biscuitbiscuit]

Tell me What formula you used ? I mean Tell me what values you input in V^2/R ?

Hope this helps

 

[NinjaInPyjamas]

Do you want me to explain?

yes please ^_^

 

[Thought blocker]

View attachment 39453 Hope this helps

ty

 

[biscuitbiscuit]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_22.pdf
Someone "Q6(d)", please

 

[Snow Angel]

hi can u please explain the following questions? can u also plz draw the sketches and post it?
question 7b) from: papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w04_qp_2.pdf

question 5a) and 6b) from: papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w07_qp_2.pdf

 

[Suchal Riaz]

yes please ^_^

okay so it is very simple:
difference in pressure = rho g (difference on height)
difference in height= 6
only D and C had difference of 6
the height of column attached to high pressure will have smaller height.
so D is answer.

 

[Suchal Riaz]

hi can u please explain the following questions? can u also plz draw the sketches and post it?
question 7b) from: papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w04_qp_2.pdf

question 5a) and 6b) from: papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w07_qp_2.pdf

 

[Suchal Riaz]

hi can u please explain the following questions? can u also plz draw the sketches and post it?
question 7b) from: papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w04_qp_2.pdf

question 5a) and 6b) from: papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w07_qp_2.pdf

 

[Suchal Riaz]

please so 5(a) of that paper i have got to go

ty

 

[Thought blocker]

please so 5(a) of that paper i have got to go

Sure :
5a)
its easier if u convert the angle in radian ie multiply by (π/180°) ----> 60° = π/3 rads.
n c this --->
thts whr the new wave will start!

So it would look like :

Correct me if it is wrong. ZaqZainab Suchal Riaz

 

[usama321]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s10_qp_22.pdf
Someone "Q6(d)", please

CB also has resistance. So there is some voltage across it too. The rest of the voltage is then equally dissipated across the two parallel wires

 

[NinjaInPyjamas]

okay so it is very simple:
difference in pressure = rho g (difference on height)
difference in height= 6
only D and C had difference of 6
the height of column attached to high pressure will have smaller height.
so D is answer.

ok, so it really simple! thanks!

 

[Snow Angel]

thank u very much but i dont think i asked abt the current question. the actual question is question 6b) from :
papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_2.pdf

thanks in advance. Suchal Riaz

 

[Thought blocker]

thank u very much but i dont think i asked abt the current question. the actual question is question 6b) from :
papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_2.pdf

thanks in advance. Suchal Riaz

Sure :
5a)
its easier if u convert the angle in radian ie multiply by (π/180°) ----> 60° = π/3 rads.
n c this --->
thts whr the new wave will start!

So it would look like :

Correct me if it is wrong. ZaqZainab Suchal Riaz

 

[Snow Angel]

View attachment 39458

thank u very much but i dont think i asked abt the current question. the actual question is question 6b) from :
papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w07_qp_2.pdf

thanks in advance. Suchal Riaz

 

[biscuitbiscuit]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_21.pdf
"Q6(ii) " sketch would be appreciated