Physics paper 1 question

[GorgeousEyes]

My book says it's 6v ac, can you tell me which year this is and which question pls.

i think it should be 600 v dc

 

[nononona]

can somebody plz explain Q 17 O/N 10 V 1

 

[Othman]

i think it should be 600 v dc

I think that is connected to the anode.

 

[Othman]

i think it should be 600 v dc

No, I'm sure now that the cathode is 6v ac and the circuit ( connects anode and cathode ) is 600v dc ( 3000 in my book ) but the pastpapers maybe means it to be high only.

 

[sara fayed]

I'm quite confused with question 33 from summer 2012 variant 2 ( http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_s12_qp_12.pdf )
Can anyone explain how it's 8.0 V and not 12V?

what about the other resistor they must share the voltage but according to the resistance of each one

 

[nononona]

6 v ac
6 v dc
600 v ac
600 v dc

i think it should be 600 v d.c because it must be d.c and must be high voltage

 

[Othman]

i think it should be 600 v d.c because it must be d.c and must be high voltage

Two power supplies in the CRO, one dc and one is ac...

 

[humdono]

sorry its o/n p-11 q-37

 

[nononona]

Two power supplies in the CRO, one dc and one is ac...

i dont know what you are talking about all i know is that the connection b/w the cathode and the anode is d.c and that it should be high voltage so that it will cause thermionic emission are you talking about the a.c connection to the Y plates ?

 

[Othman]

sorry its o/n p-11 q-37

Wrong also.

 

[Othman]

i dont know what you are talking about all i know is that the connection b/w the cathode and the anode is d.c and that it should be high voltage so that it will cause thermionic emission are you talking about the a.c connection to the Y plates ?

No to the cathode

 

[Othman]

sorry its o/n p-11 q-37

I opened 2011, you mean o/n 2010 ?

 

[sara fayed]

please help nov 12 variant 11 question 18 i don't understand the question

 

[Othman]

please help now 12 variant 11 question 18 i don't understand the question

Link or year pls.

 

[sara fayed]

sorry i mean nov12 11 question 18

Link or year pls.

 

[nononona]

Link or year pls.

i think she means 2012

 

[nononona]

can somebody plz explain Q 13
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w12_qp_13.pdf

 

[Othman]

can somebody plz explain Q 13
http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Physics (0625)/0625_w12_qp_13.pdf

I think C, as the depth is the same...

 

[nononona]

I think C, as the depth is the same...

this is the correct answer in the mark scheme but i dont understand isnt pressure force / area and the area is smaller at Y?
also why not the force is equal?

 

[nononona]

m/j 2010 v 11 q 35 isnt the motor d.c why is the answer D