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April 28, 2024, 03:01:58 am
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Author Topic: VCE Physics Question Thread!  (Read 610049 times)  Share 

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KiNSKi01

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Re: VCE Physics Question Thread!
« Reply #2175 on: November 09, 2018, 12:05:06 am »
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Sometimes in graphing questions (not always) we may be asked to apply a relevant transformation to the data ... right?

I just want to know some of the transformations and which AoS they r likely linked to so I can chuck it on my cheat sheet
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KiNSKi01

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Re: VCE Physics Question Thread!
« Reply #2176 on: November 10, 2018, 06:45:10 pm »
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Dashed line= original current
solid line= current after intensity of light source is DOUBLED and frequency is KEPT THE SAME

I understand why increasing the intensity of light source will increase photo current but not max KE of photoelectrons and that the stopping voltage would remain the same

However, this graph (taken from 2017 NHT EXAM) shows that the voltage at which the saturation point occurs also increases (appears to increase from roughly 0.5 V to 1.0 V) Am I just getting confused by what the x axis means? Someone please explain  ;)
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Freddie Hg

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Re: VCE Physics Question Thread!
« Reply #2177 on: November 10, 2018, 07:05:50 pm »
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Quote from: KiNSKi01 on November 10, 2018, 06:45:10 pm
Dashed line= original current
solid line= current after intensity of light source is DOUBLED and frequency is KEPT THE SAME

I understand why increasing the intensity of light source will increase photo current but not max KE of photoelectrons and that the stopping voltage would remain the same

However, this graph (taken from 2017 NHT EXAM) shows that the voltage at which the saturation point occurs also increases (appears to increase from roughly 0.5 V to 1.0 V) Am I just getting confused by what the x axis means? Someone please explain  ;)
maybe its a user error on your behald but i dont see a change between the two graphs x intercept
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KiNSKi01

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Re: VCE Physics Question Thread!
« Reply #2178 on: November 10, 2018, 07:13:40 pm »
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no not the x axis intercepts but when the gradient of the graphs reach zero
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Freddie Hg

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Re: VCE Physics Question Thread!
« Reply #2179 on: November 10, 2018, 07:16:55 pm »
+1
Quote from: KiNSKi01 on November 10, 2018, 07:13:40 pm
no not the x axis intercepts but when the gradient of the graphs reach zero
huh. idk maybe they made a mistake or maybe because gradient equals y/x increasing y drecreases x to maintain the same rate of change therefore x decreases. idk man everytime i was taught this i leveled the graph off at the same point.
i guess i dont know.
so Bump!!
« Last Edit: November 10, 2018, 08:13:01 pm by Freddie Hg »
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Bri MT

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Re: VCE Physics Question Thread!
« Reply #2180 on: November 10, 2018, 07:44:07 pm »
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yeah.. I was taught that they should level off at the same point too, so I don't know why that graph would be like that.


Maybe it's related to that they showed one as a straight line segments and the other one as gradual change & that just showing up differently?
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KiNSKi01

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Re: VCE Physics Question Thread!
« Reply #2181 on: November 10, 2018, 07:49:40 pm »
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Quote from: miniturtle on November 10, 2018, 07:44:07 pm
Maybe it's related to that they showed one as a straight line segments and the other one as gradual change & that just showing up differently?

Lol was going to ask why they did that too  :P

So basically it's probably something I shouldn't be concerned about and I should be fine to assume the two graphs would level off at same point in similar questions?
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Re: VCE Physics Question Thread!
« Reply #2182 on: November 10, 2018, 08:00:48 pm »
+2
Quote from: KiNSKi01 on November 10, 2018, 07:49:40 pm
Lol was going to ask why they did that too  :P

So basically it's probably something I shouldn't be concerned about and I should be fine to assume the two graphs would level off at same point in similar questions?

Yes :)
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KiNSKi01

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Re: VCE Physics Question Thread!
« Reply #2183 on: November 10, 2018, 08:04:59 pm »
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great!

thankyouuuu
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KiNSKi01

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Re: VCE Physics Question Thread!
« Reply #2184 on: November 12, 2018, 05:04:59 pm »
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Ok so according to an insight exam paper

Light emitted during electron transitions in an emission spectrum experiment and light absorbed by valence electrons during an absorption spectrum experiments are both experiments which demonstrate the particle nature of light.

Lol isn't this a bit of stretch? Or am I wrong?
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Freddie Hg

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Re: VCE Physics Question Thread!
« Reply #2185 on: November 12, 2018, 05:08:55 pm »
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Quote from: KiNSKi01 on November 12, 2018, 05:04:59 pm
Ok so according to an insight exam paper

Light emitted during electron transitions in an emission spectrum experiment and light absorbed by valence electrons during an absorption spectrum experiments are both experiments which demonstrate the particle nature of light.

Lol isn't this a bit of stretch? Or am I wrong?
no this is correct.
to explain the quantised states which cause the absorption and emission bands we rely on the dual nature of light as both a particle and a wave. so these experiments do give an indication that light may behave like a particle
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KiNSKi01

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Re: VCE Physics Question Thread!
« Reply #2186 on: November 12, 2018, 05:14:29 pm »
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Cheers!

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DinWell

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Re: VCE Physics Question Thread!
« Reply #2187 on: November 13, 2018, 04:55:00 pm »
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This is from NHT 2017 exam. Why is the answer X to Y? Doesn't that create a downwards flux?
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Freddie Hg

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Re: VCE Physics Question Thread!
« Reply #2188 on: November 13, 2018, 05:01:47 pm »
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Quote from: DinWell on November 13, 2018, 04:55:00 pm
This is from NHT 2017 exam. Why is the answer X to Y? Doesn't that create a downwards flux?
it creates an upwards magnetic field? maybe you should check your right hand grip rule
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DinWell

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Re: VCE Physics Question Thread!
« Reply #2189 on: November 13, 2018, 05:05:49 pm »
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Quote from: Freddie Hg on November 13, 2018, 05:01:47 pm
it creates an upwards magnetic field? maybe you should check your right hand grip rule
I was doing the attached rule. Idk if I'm going crazy but I get a downwards flux.
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