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March 29, 2024, 10:27:15 am

Author Topic: VCE Physics Question Thread!  (Read 603397 times)  Share 

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~T

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Re: VCE Physics Question Thread!
« Reply #195 on: October 05, 2013, 09:40:44 pm »
0
I definitely agree nliu, which is why I compromise by sitting on the fence with dotted lines. I think they clearly convey both the "I know what you want me to do" and "I know what is actually going on here" messages.
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barydos

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Re: VCE Physics Question Thread!
« Reply #196 on: October 06, 2013, 12:57:31 pm »
0
In the VCAA 2009 paper there was a 3-mark question:
Spoiler
At the time of Young's double-slit experiment there were two competing models of the nature of light. Explain how Young's experiment supported one of these models compared with the other."
Assessment Report Comment:
Spoiler
Young’s experiment demonstrated interference effects, so his work supported the wave model of light. The particle model did not explain the interference effect.
Is a response like that enough for the whole 3 marks??

Also in general, for some 2-mark questions such as "What is the power dissipated in R1?"
Obviously it's expected that there's some working out involved. But say you did the working out straight into your calculator, and got the right answer (no working out written down). Would you still obtain the full marks? (like for multiple choice questions)
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Aurelian

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Re: VCE Physics Question Thread!
« Reply #197 on: October 06, 2013, 01:12:50 pm »
+2
In the VCAA 2009 paper there was a 3-mark question:
Spoiler
At the time of Young's double-slit experiment there were two competing models of the nature of light. Explain how Young's experiment supported one of these models compared with the other."
Assessment Report Comment:
Spoiler
Young’s experiment demonstrated interference effects, so his work supported the wave model of light. The particle model did not explain the interference effect.
Is a response like that enough for the whole 3 marks??

Personally I would add what the particle model would predict for the experiment, and perhaps mention that nature of the interference pattern actually observed as well (i.e. alternating dark and light fringes). I do think that some examiners would only award you two marks for the response given there by the examiner's report...

Also in general, for some 2-mark questions such as "What is the power dissipated in R1?"
Obviously it's expected that there's some working out involved. But say you did the working out straight into your calculator, and got the right answer (no working out written down). Would you still obtain the full marks? (like for multiple choice questions)

Why not just write down the working to be safe? Usually you'll only need one or two very short lines =) You'll also minimize the chance of making a silly mistake, as well as enabling the examiner to give you one of the two marks if you get the answer wrong but have valid working.
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barydos

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Re: VCE Physics Question Thread!
« Reply #198 on: October 06, 2013, 01:27:32 pm »
+1
Personally I would add what the particle model would predict for the experiment, and perhaps mention that nature of the interference pattern actually observed as well (i.e. alternating dark and light fringes). I do think that some examiners would only award you two marks for the response given there by the examiner's report...

Why not just write down the working to be safe? Usually you'll only need one or two very short lines =) You'll also minimize the chance of making a silly mistake, as well as enabling the examiner to give you one of the two marks if you get the answer wrong but have valid working.

Alright, I'll keep that in mind, thanks.

And yeah aha I know I know, I was just curious about it more than anything else :P
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~T

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Re: VCE Physics Question Thread!
« Reply #199 on: October 06, 2013, 01:29:55 pm »
0
Just to clarify on that, we don't strictly require working do we? I always write my working down anyway, but there have been a few two mark questions for which you could easily just write the answer.

I guess my query is:

No working but correct answer = full marks regardless of the number of marks?
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Alwin

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Re: VCE Physics Question Thread!
« Reply #200 on: October 06, 2013, 01:35:09 pm »
+1
In the VCAA 2009 paper there was a 3-mark question:
Spoiler
At the time of Young's double-slit experiment there were two competing models of the nature of light. Explain how Young's experiment supported one of these models compared with the other."
Assessment Report Comment:
Spoiler
Young’s experiment demonstrated interference effects, so his work supported the wave model of light. The particle model did not explain the interference effect.
Is a response like that enough for the whole 3 marks??

Also in general, for some 2-mark questions such as "What is the power dissipated in R1?"
Obviously it's expected that there's some working out involved. But say you did the working out straight into your calculator, and got the right answer (no working out written down). Would you still obtain the full marks? (like for multiple choice questions)

If I remember correctly the marking scheme for such questions went like this:

Your 1st Question
Your 1st Question
Explain the wave model of light and what it predicts (interference pattern of light and dark)   1 Mark
Explain the particle model of light and what it predicts (no such pattern, just one light band)   1 Mark
Young's DS Experiment supported the wave model of light because a fringe interference pattern was observed on the screen   1 Mark

You have to remember that most assessment reports are brief because they don't want students to memorise answers from the reports. So, they just touch on important points

Your 2nd Question
Your 2nd Question
Correct formula with wrong values or wrong conversion substituted in   0 Marks
Correct formula with right values substituted in but wrong answer   1 Mark
Correct formula with right values substituted in and correct answer   2 Mark
No/wrong formula and wrong answer   0 Marks (no duh)
Wrong formula/working but somehow correct answer   1 Mark (you showed bad physics in your working)
No formula and correct answer   1 Mark I'm pretty sure for 2013 because for short answer questions it says:
"In questions worth more than 1 mark appropriate working should be shown."

The moral of the story? Just show some working :))

Even if it's a MC question where anything that gets you the right answer goes (even closing your eyes and guessing without righting a single formula) you should write some working. Why? It's helps when you go back and double check your answer so you can make sure you used the right method and substituted correctly!

:D
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BasicAcid

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Re: VCE Physics Question Thread!
« Reply #201 on: October 06, 2013, 02:42:46 pm »
+1
You have to remember that most assessment reports are brief because they don't want students to memorise answers from the reports. So, they just touch on important points

Or better yet copy down the assessor's report onto your A3 cheat sheet

lolipopper

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Re: VCE Physics Question Thread!
« Reply #202 on: October 06, 2013, 02:55:19 pm »
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"In questions worth more than 1 mark appropriate working should be shown."

where does it say that?
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Alwin

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Re: VCE Physics Question Thread!
« Reply #203 on: October 06, 2013, 03:06:34 pm »
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where does it say that?

in the 2013  trial paper is says:
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~T

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Re: VCE Physics Question Thread!
« Reply #204 on: October 06, 2013, 03:48:07 pm »
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I had always thought the fact that is explicitly states "should" rather than the "must" of Methods and Spesh exams suggests that they want you to but they can't actually mark you down for it.
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Alwin

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Re: VCE Physics Question Thread!
« Reply #205 on: October 06, 2013, 03:54:14 pm »
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I had always thought the fact that is explicitly states "should" rather than the "must" of Methods and Spesh exams suggests that they want you to but they can't actually mark you down for it.
"You should clean your room"
"You must clean you room"

Either way you get yelled at if you don't do it :P


But seriously, better safe than sorry. Plus, what if you did the question all on your calculator get the answer wrong. Don't even get any marks for method or working. It's just safer this way :))

I always showed full working last year, but if someone on AN wants to try it with no working at all this year be my guest and let us know how it went :) (no, this is not a personal challenge at you nliu :P)
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lzxnl

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Re: VCE Physics Question Thread!
« Reply #206 on: October 06, 2013, 04:39:19 pm »
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I had always thought the fact that is explicitly states "should" rather than the "must" of Methods and Spesh exams suggests that they want you to but they can't actually mark you down for it.

If you're willing to take the risk, be my guest.

"You should clean your room"
"You must clean you room"

Either way you get yelled at if you don't do it :P


But seriously, better safe than sorry. Plus, what if you did the question all on your calculator get the answer wrong. Don't even get any marks for method or working. It's just safer this way :))

I always showed full working last year, but if someone on AN wants to try it with no working at all this year be my guest and let us know how it went :) (no, this is not a personal challenge at you nliu :P)

Alwin, I'm not going to potentially jeopardise my physics score just to test the system :P
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lolipopper

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Re: VCE Physics Question Thread!
« Reply #207 on: October 06, 2013, 10:15:52 pm »
-2
in the 2013  trial paper is says:
(Image removed from quote.)

Dont be smartass alright. It was a genuine question.

i just got the physics marking scheme from my teacher. it says "where questions dont specify that the working must be shown, if the correct answer is in the box the student receives full marks". Maybe you should get some suffice information yourself before absolutely classifying other peoples question invalid and, from the sound of your tone, stupid.
« Last Edit: October 06, 2013, 10:33:48 pm by lolipopper »
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Phy124

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Re: VCE Physics Question Thread!
« Reply #208 on: October 07, 2013, 12:15:03 am »
+3
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barydos

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Re: VCE Physics Question Thread!
« Reply #209 on: October 07, 2013, 06:04:42 pm »
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As you wish.

Are we still required to know about incandescent (filament) light globes?
E.g. "explain, in terms of electron behaviour how light is produced in an incandescent (filament) light globe?"
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