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August 10, 2020, 08:32:36 am

Author Topic: VCE Physics Upgrade My Answer  (Read 764 times)  Share 

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Bri MT

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VCE Physics Upgrade My Answer
« on: February 22, 2019, 03:19:43 pm »

What is this thread for?
If you want feedback on your answers so you can get more marks for your knowledge, this is the place!

Step 1. Share a question you didn't get full marks on, including your answer and how many marks the question was worth
Step 2. Wait for another user (maybe even multiple!) to provide feedback on how they might've approached the question and how you could improve your answer
Step 3. Apply the feedback you've learnt to aim for higher marks more confidently :)

Who can/will provide feedback?
Everyone is welcome to contribute; even if you're unsure of yourself, providing different perspectives is incredibly valuable.

Please don't be dissuaded if you haven't finished Year 12, or didn't score as highly as others, or your advice contradicts something else you've seen on this thread, or whatever; none of this disqualifies you from helping others. And if you're worried you do have some sort of misconception, put it out there and someone else can clarify and modify your understanding! 

There'll be a whole bunch of other high-scoring students with their own wealths of wisdom to share with you, including TuteSmart tutors! So you may even get multiple answers from different people offering their insights - very cool.

To ask a question or make a post, you will first need an ATAR Notes account. You probably already have one, but if you don't, it takes about four seconds to sign up - and completely free!



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Re: VCE Physics Upgrade My Answer
« Reply #1 on: May 15, 2019, 09:34:13 am »
Alright, here's my question:

And (very) partial answer:

Honestly really wondering how I could actually fully answer this let alone set it out properly.


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Re: VCE Physics Upgrade My Answer
« Reply #2 on: May 19, 2019, 10:09:48 am »
Alright, here's my question:
(Image removed from quote.)

And (very) partial answer:
(Image removed from quote.)

Honestly really wondering how I could actually fully answer this let alone set it out properly.
I believe for part a), you could use the formula . Where is the charge of an electron and . This will enable you to find the speed .

For part b), we can again use the same formula to understand the situation. The idea before the formula is that kinetic energy is being converted to electric potential energy or vice versa. Therefore, in the context of this question since the proton is moving from a negative plate to a positive plate, the energy transformation we are interested in is conversion from kinetic energy to electric potential energy. Hence, qV tells us the amount of electric potential energy that is required for the proton to move and cross the positive plate. If the amount of kinetic energy energy that the proton possesses is less than qV, it won't be able to cross the plate but if it exceeds qV, it will be able to cross the plate.
But we know that the magnitude of the electrical charge of protons and electrons are the same so qV from part a) is still the same, and we know that the speed found in part a) is the speed of the proton initially. What we can see is that since the mass of the proton is greater than that of an electron, for the proton will be greater than so the proton will make it across the positive plate.

Hope this helps!

« Last Edit: May 19, 2019, 10:11:19 am by fiona_atarnotes »

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