Section I: Part B - Short Answer Responses (1 Viewer)

[danz90]

How do you think you went in the Short Answers section?

Discuss answers/questions.

 

[Aaron.Judd]

I think I went pretty well. While multiple choice was harder than normal. Short answers were easier than normal.

 

[karnage]

Um you know that primary and secondary coil one?

Which one makes the sparks? A or B ?

 

[Aaron.Judd]

Defiantly A.

 

[karnage]

aw, fckn knew something was wrong there coz i was thinkin that B wasnt even in the coil

i justified myself by saying B was like a step up transformer therefore making greater voltages.

so yea, guess i got the next one wrong too.

how much marks was that? like 8 all up?

 

[dolbinau]

What reason did you give for A? (I did A but not sure of reason).

 

[timmiitippii]

oh thank god i couldnt shake this thought of the magnetic field lines coming out the ends of the coil so that if its in A, it wont cut it but in B it will cut a bit at the end.
But then i rejected that whole train of thought and gave a textbook answer about more flux lines cut etc even though i couldn't see how lol

 

[old.skool.kid]

aw, fckn knew something was wrong there coz i was thinkin that B wasnt even in the coil

i justified myself by saying B was like a step up transformer therefore making greater voltages.

so yea, guess i got the next one wrong too.

how much marks was that? like 8 all up?

Yeah i stuffed that one up to, it was only worth 3 luckily.

 

[dolbinau]

What was the reason for that? I said greater change in flux+iron core magnifies field. But I wasn't sure.

 

[shais]

A or B .. omg . what are the odds of getting this wrong ..

 

[Aaron.Judd]

A or B .. omg . what are the odds of getting this wrong ..

1/2 noob.

 

[Eddyuuki]

i think ull prolly only loose 1 mark for getting it wrong, cuz it sayed justify. So it doesnt matter as long as u can back it up.....right? Welps that what im hoping for cuz i said b as well lawl

 

[dolbinau]

in 27, which wire was pure and what was the justification?

 

[Aaron.Judd]

I said the wire with the steep gradient was pure. Chrmomium.

 

[tacogym27101990]

in 27, which wire was pure and what was the justification?

i said wire x was pure because the slope was larger meaning the resistance was less because the resistance was 1/slope

 

[dolbinau]

Was that X or Y? I think I got that wrong, strangely. I Put X IIRC. Were we told to actually graph something?

What other parts were there to that question? (I don't have 27)

 

[JoeyTorres]

in 27, which wire was pure and what was the justification?

Yea line X was pure chromium and you could tell cos alloys have impurities which decrease conductivity

 

[karnage]

in 27, which wire was pure and what was the justification?

i said wire x coz the inverse gradient givs u the resistance, so yea i said some shit about how pure metals hav less resistance than the alloys which is seen in the lower resistance

 

[snowconesyum]

me too - you got the more gradual slope having greater resitance (dont remember which was x and y)
therefore the one with lower resistance was chromium, because metals are good conductors, and alloys have greater resistance and less good conductance... i think that's it.

 

[sonnylongbottom]

yep wire X because of the gradient