HSC Physics Predictions / Thoughts (6 Viewers)

[Speed’o’sound Sonic]

Does anybody know what the answers to the MCQ were? Also, for the rod question, what was the answer? (Rod on rails)

The rod was harder to move without B field. Not sure of any specifics. Any multis in particular?

 

[Bored_of_Physics]

What we saying?

 

[Speed’o’sound Sonic]

Wait up A is what I said but idk If it’s even right aghhh

Wait I said one of the sinusoidal ones don’t remember which rn

 

[Speed’o’sound Sonic]

Wait I said one of the sinusoidal ones don’t remember which rn

Chose cosine I think.

 

[S12345B]

Chose cosine I think.

i agree. i think it should be B (cosine wave).

I put C

 

[Bored_of_Physics]

i agree. i think it should be B (cosine wave).

I put C

Same aahahhaha thought there was no change in flux meaning no emf rip

 

[Xanthi]

At the start, the charges in PQ are moving horizontally in the same direction as the magnetic field, therefore no magnetic force is generated. After 1/4 rotation they moved vertically perpendicular to field. So I picked A?

 

[aaaaaaaasa]

At the start, the charges in PQ are moving horizontally in the same direction as the magnetic field, therefore no magnetic force is generated. After 1/4 rotation they moved vertically perpendicular to field. So I picked A?

I chose A aswell, not sure if its correct...

 

[Maurice69]

19 C is right though! Its not cutting any field lines because its parallel to them all - so how can an emf be induced? It can't

 

[Xanthi]

Nah sorry mate looking at around 94-95 at the moment

If you end up getting 94-95, I think that will be enough most likely.

 

[Maurice69]

Also what did everyone get for 20?

 

[Xanthi]

19 C is right though! Its not cutting any field lines because its parallel to them all - so how can an emf be induced? It can't

The motion of the charges is important, after 1/4 rotation it is perpendicular to field

 

[Maurice69]

Ok, I put B. But I still am convinced that this ain't right

 

[ItzZoni]

A lot of my friends picked C for 19 but i did B. Honestly not sure what the real answer is

 

[Speed’o’sound Sonic]

The motion of the charges is important, after 1/4 rotation it is perpendicular to field

After 1/4 rotation it is parallel to field you mean? Answer should be A for sure.
agh! Another mark lost

 

[Speed’o’sound Sonic]

Answer is A, I’d back it 100% now. Too bad I but B in the exam

 

[Maurice69]

What did you all get for 20?

 

[Speed’o’sound Sonic]

What did you all get for 20?

I got A, where magnitude is constant

 

[ItzZoni]

What did you all get for 20?

From what I've heard A is a common answer. I did D though sadly

 

[Xanthi]

Magnitude shouldn't be constant? Ball slows down as it moves up so normal force changes?