General Thoughts: Physics (1 Viewer)

[iStudent]

If voltage eliminated it, whats the point of light? It said photoelectric, not thermionic.

The light is the photoelectric effect. The experimenter adjusted the voltage just high enough so that thermionic doesn't occur but high enough so that photoelectric effect can occur at any frequency (only happens if there is no work function). essentially, the voltage overcame the work function.

 

[Kurosaki]

34 users browsing this thread, wtf go play games

 

[faisalabdul16]

Such an easy exam!!

Multiple choice answers, I'm 100% sure they are correct
1) A
2) B
3) C
4)D
5)D
6) C
7) B
8) A
9) A
10)A
11)B
12)C
13)D
14)D
15)B
16)A
17)D
18)A
19)C
20)C

 

[iStudent]

The experimenter is trying to deduce the work function and threshold frequency of the circuit. This is another way to find it (the other, textbook method would be the use of stopping voltage).

 

[iStudent]

34 users browsing this thread, wtf go play games

Why are you here then?

 

[RIP3U]

Such an easy exam!!

Multiple choice answers, I'm 100% sure they are correct
1) A
2) B
3) C
4)D
5)D
6) C
7) B
8) A
9) A
10)A
11)B
12)C
13)D
14)D
15)B
16)A
17)D
18)A
19)C
20)C

20 is D cus v^2=19.6^2 + 19.6^2

What answer did everyone get for the power loss question?

 

[BiasedBuffalo]

Such an easy exam!!

Multiple choice answers, I'm 100% sure they are correct
1) A
2) B
3) C
4)D
5)D
6) C
7) B
8) A
9) A
10)A
11)B
12)C
13)D
14)D
15)B
16)A
17)D
18)A
19)C
20)C

Nice troll.

 

[dshah73]

Please tell me I'm not the only one who found the exam difficult - got so screwed over by the projectile crap and the weird KE stuff
:alone:

It's okay, i found it pretty hard!

 

[Brightergull]

Does anyone know what happens if you put three answers for one question??? Like with workong out ofcourse. Like for some reason i decided to question my basic understanding of power loss and as a result not only subbed the values into the equation but then on the bottom of the page i started doong calculation on the difference in power between the primary and secondary coil and shor

 

[cyphar]

That exam was fairly easy, IMO. Any idea when the "correct" answers will be posted?

 

[BiasedBuffalo]

Does anyone know what happens if you put three answers for one question??? Like with workong out ofcourse. Like for some reason i decided to question my basic understanding of power loss and as a result not only subbed the values into the equation but then on the bottom of the page i started doong calculation on the difference in power between the primary and secondary coil and shor

I did exactly that and the two answers were identical. Are you sure you did it right?

 

[Brightergull]

I did exactly that and the two answers were identical. Are you sure you did it right?

Tbh, i dont remember if my answer was identical but im sure one of my answers were right. Bostes would be evil not to give me full marks for it

 

[Nigganigam]

What did you get for the gravitational potential energy curve? What did it look like?

 

[BiasedBuffalo]

iirc it was a bit like this, but a straight horizontal line from t=10
http://hsc.csu.edu.au/physics/core/space/9_2_1/PhyFig1a.gif

 

[Fizzy_Cyst]

A few tricky questions!

Imo harder than last year. Some qu stains which I see very few students getting full marks in.

Options seemed pretty straight forward, especially when you predict the last 3 questions, lol

 

[TrentsUnicorn]

Was I the only one who didn't get that weird projectile one?

 

[schmickrx3]

Was I the only one who didn't get that weird projectile one?

Nope!!, your not the only one. To me that was a pretty crap question tbh. Others have already explained it in this thread if you want to know.

 

[rated]

Was I the only one who didn't get that weird projectile one?

I thought it was a bit weird as well. The bit where it said include calculations, I was mindblank since they only provided us with the time it took to reach maximum height. All I knew was, it was going to take another 3s to fall to the ground.

 

[theodore0307]

It seemed really short to me? And I was expecting so much more on relativity then just a couple multiple choice... but gotta say feel pretty good with it

you probably left something out if you thought it was too short

 

[theodore0307]

Was I the only one who didn't get that weird projectile one?

It wasn't worth my time. I had no clue what to do.