- Messages
- 41
- Reaction score
- 20
- Points
- 18
Hi everyone. I was doing paper 3 oct/nov 10 (physics) and there was some stuff i don't get, so could someone please help me out? MY EXAM'S TOMORROW!
Here's a link to the paper: http://www.xtremepapers.me/CIE/Cambridg ... _qp_32.pdf
Q.1b.ii) I don't understand why the skier's speed is increasing
Q.4b) What's the correct answer? I got 23100000 J but in the mark scheme it's 92400000 J. Why is it multiplied by 4??
Q.8a) I'm not sure if my answer's right. Here's what i wrote: "By attaching the primary coil to an a.c. supply, the current constantly fluctuates, cutting the coils of the primary coil which produces a magnetic field. This magnetic field is guided by the iron core to the secondary coil, where it cuts the coils of the secondary coil causing a current to flow in the secondary coil." Is that correct?
Q.8d) In the mark scheme it says : Thinner or smaller cables / less metal used. I don't get why! I already wrote that there will be a lower current and so less heat is lost.
Q.10b.i) the mark scheme says the bottom one. i don't get why!
Finally, im going to do Variant 2 of 2008 and 2009 cuz i already did variant 1 b4 but my center does v1 so are the questions going to be completely different to the ones im going to do, or what?
Here's a link to the paper: http://www.xtremepapers.me/CIE/Cambridg ... _qp_32.pdf
Q.1b.ii) I don't understand why the skier's speed is increasing
Q.4b) What's the correct answer? I got 23100000 J but in the mark scheme it's 92400000 J. Why is it multiplied by 4??
Q.8a) I'm not sure if my answer's right. Here's what i wrote: "By attaching the primary coil to an a.c. supply, the current constantly fluctuates, cutting the coils of the primary coil which produces a magnetic field. This magnetic field is guided by the iron core to the secondary coil, where it cuts the coils of the secondary coil causing a current to flow in the secondary coil." Is that correct?
Q.8d) In the mark scheme it says : Thinner or smaller cables / less metal used. I don't get why! I already wrote that there will be a lower current and so less heat is lost.
Q.10b.i) the mark scheme says the bottom one. i don't get why!
Finally, im going to do Variant 2 of 2008 and 2009 cuz i already did variant 1 b4 but my center does v1 so are the questions going to be completely different to the ones im going to do, or what?
