When a particle enters a magnetic field:
Greater charge=more curvature
Smaller mass= more curvature
Slower=more curvature and increased radius

Right?

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Reply 131

RealTime

Original post by champion1

Hi! There's this question I just don't understand and I don't even understand the mark scheme!!!
Can somebody please explain it to me, the question and the mark scheme are attached.

Thanks! :smile:

It's similar to Young's double slit experiment where maxima and minima are formed due to diffraction. In this case the "slit" is a hole instead - the nucleus which the electrons are diffracted by (varying scattering angle), and a circular diffraction pattern forms. The minima forms due to the electrons acting as a wave and causing destructive interference and the waves are out of phase, cancelling eachother out. Maxima occurs when they are in phase and superposition occurs. They only give a bit of the graph, seeing more helped me link it to Young's double slit experiment and you can use ideas of that on here, just keep in mind that a circular pattern forms rather than a fringe.

(here's the full graph with picture of why it forms)

My answer avoids using phasors to explain it, I find it easier that way cos I find talking about phasors can get a bit confusing.

(edited 8 years ago)

Reply 132

username1200599

Original post by Mutleybm1996

When a particle enters a magnetic field:
Greater charge=more curvature F=Bvq
Smaller mass= more curvature F=ma
Slower=more curvature and increased radius Nope. r = mv/Bq so higher v results in higher value of r and v = ma/bq so higher v results in higher a

Right?

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Have highlighted in bold.

Reply 133

Mutleybm1996

Original post by Iridann

Have highlighted in bold.

Cheers

Could you quickly explain how a generator and motor work?
The electromagnetism stuff really confuses me

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Reply 134

username1200599

Original post by Mutleybm1996

Cheers

Could you quickly explain how a generator and motor work?
The electromagnetism stuff really confuses me

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Pff Idefk. I'm gonna be surprised if I can get a good grade in tomorrow's exam.

Reply 135

Liam_Heathcote

Is it just my school that is awful at teaching physics, or does anyone else feel like failure is imminent?

Reply 136

username1200599

Original post by Liam_Heathcote

Is it just my school that is awful at teaching physics, or does anyone else feel like failure is imminent?

Feel like this unit is gonna go awfully. So unprepared for section C >~<

It's okay though, looks like I don't need this A level to meet my offer. :colondollar:

Reply 137

Liam_Heathcote

Original post by Iridann

Feel like this unit is gonna go awfully. So unprepared for section C >~<

It's okay though, looks like I don't need this A level to meet my offer. :colondollar:

underprepared is the biggest understatement ever, spent most of my time revising for the maths C4 exam and I've left myself one day for this thing :'D. How did you find g494?

Reply 138

username1200599

Original post by Liam_Heathcote

underprepared is the biggest understatement ever, spent most of my time revising for the maths C4 exam and I've left myself one day for this thing :'D. How did you find g494?