General Thoughts: Physics (6 Viewers)

[Ozzyy]

I got 1.5 v as well, and 5000 v.m. I thnk you are correct

I meant 0.15* 1.5 was a typo O_O

 

[tutorhunt]

for the question where you had to draw the emf versus time, i drew the wrong graph at first. But then i crossed it out and drew a new graph with all the correct features. However i didnt use a ruler (i only realised 20seconds before end of exam), would this cost me a mark?

Did you provide some sort of way to demonstrate how the EMF got larger in the second one?

 

[superSAIyan2]

^yeh. i showed that the emf doubled in the second second. and the frequency was double as well

 

[tutorhunt]

I meant 0.15* 1.5 was a typo O_O

oh yep, just realised, i got 0.15 as well, looking at the paper now

 

[tutorhunt]

yeh. i showed that the emf doubled in the second second. and the frequency was double as well

I would think it would be okay then, my first graph looked horrible, i scribbled out like 2 different lines, but in the end I think they understood

 

[Jimmy2064]

I got 51.91 but not sure why g is 9.8. Is the space station being tested on earth

Probably just hypothetical. It's BOS, who knows lol.

 

[Jimmy2064]

I spoke about both superconductors (maglev train and mri) and semiconductors (solid state devices and solar cells) and linked their use to society x.x and I drew a line of best fit lightly, It didn't say you had to but i did it anyway just incase :s

same and same. My teacher said always draw a line of best fit, unless it says otherwise, so I did (you couldn't lose marks for it, could you?)

 

[Jimmy2064]

I would think it would be okay then, my first graph looked horrible, i scribbled out like 2 different lines, but in the end I think they understood

What should graph have looked like?

 

[Menomaths]

What did you guys get for the AU one? The distance from Pollux or something

 

[hjed]

Did you provide some sort of way to demonstrate how the EMF got larger in the second one?

I increased the amplitude and frequency of the sin graph.

for the question where you had to draw the emf versus time, i drew the wrong graph at first. But then i crossed it out and drew a new graph with all the correct features. However i didnt use a ruler (i only realised 20seconds before end of exam), would this cost me a mark?

Wasn't emf a sin graph!? You can't use a ruler for a sin graph (so you should be fine, from memory it was only two marks as well which means they probs won't take anything off for neatness)

 

[panda15]

What did you guys get for the AU one? The distance from Pollux or something

1.13 AU or something like that.

 

[Menomaths]

I increased the amplitude and frequency of the sin graph.



Wasn't emf a sin graph!? You can't use a ruler for a sin graph (so you should be fine, from memory it was only two marks as well which means they probs won't take anything off for neatness)

3 marks

 

[Menomaths]

1.13 AU or something like that.

Yeah something like that too

 

[Ozzyy]

1.13 AU or something like that.

Yeahh I got thaat ^ I think or something like that

 

[superSAIyan2]

i got 1.19AU???

 

[Menomaths]

i got 1.19AU???

Yeah I said something like that because I remember having a 9 in there too lol so I think I got 1.19 as well

 

[iBibah]

i wrote
V=Ed = 0.01 x 15 = 0.15 V

b)magnetic field deflects electron down. so electric field must deflect it up. so direction of field is down.
Equate forces caused by electric and magnetic field; Eq=qvB
E = 10^4 x 0.5 = 5000 N/C downwards

But didn't it ask for the voltage? So multiply 5000 by 0.01 ?

 

[superSAIyan2]

But didn't it ask for the voltage? So multiply 5000 by 0.01 ?

no part b asked for magnitude and direction of electric field. if u wanna check fizzy cist posted the paper

 

[Menomaths]

But didn't it ask for the voltage? So multiply 5000 by 0.01 ?

Asked for electric field

 

[hjed]

Yeah I said something like that because I remember having a 9 in there too lol so I think I got 1.19 as well

I had 1.190705656 AU

But didn't it ask for the voltage? So multiply 5000 by 0.01 ?

No it said electric field.