OCR PHYSICS B G495~ 18th June 2015 AM ~ A2 Physics

What exactly were they asking for in question 3 (the one about fields that had a straight line graph)?
I said the field was uniform shown by the straight line through the origin, and did two calculations which ended up as 4.2x10^3 and 4.3x10^3. Really was unsure what to do tbh.

Mass was not conserved since a gamma photon was released.

Yeah I think that's correct, I also got that too

Did anyone else get 2312K for the temperature for 3N electrons per second? It took me forever!
Also now I'm worried that I didn't read it properly and can't remember if it wanted the increased temperature or how much it had increased by

Did anyone else get 2312K for the temperature for 3N electrons per second? It took me forever!
Also now I'm worried that I didn't read it properly and can't remember if it wanted the increased temperature or how much it had increased by

I got that too, but I don't know if that's right or not.

Gamma photons have no mass!!!!

It was charge. Alpha particles are charged.

how did you do it? :/i did it quite a funny way and got the correct answer just wondered what people's methods were since my graphical calculators didn't show gamma to enough decimal places so I had to use an old fashioned calculator haha!

Wasn't it quarks



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Gamma photons have no mass!!!!

It was charge. Alpha particles are charged.

I calculated the Lorentz factor (gamma) and then rearranged the formula for calculating the Lorentz factor which involved v and made v the subject

What did you guys get in the 4 marker about the accurate representation of the decay particles in a magnetic field?

I worked out their deflection radii and found that beta particles in reality have a radius 200 times smaller than an alpha decay particle and wrote about how the diagram was inaccurate for only showing beta particles as having slightly less radius etc etc.

PS: What thing is not conserved? I wrote charge, because alpha particles are charged.

yeah i did the same should get the marks! also said that beta particle should have less deflection than shown by the diagram!

Gamma photons have energy. E=mc^2. Energy released = mass lost.

Did anyone else write Charge for the thing that isn't conserved.

It's not quarks because there are no free quarks.
It's not mass because photons have no mass.
And I can't remember what the other thing was.

What was the equation? Wasn't it an alpha decay?


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What did everyone get for the minimum X-ray wavelength? I got something like 3.3x10^-11 metres but I don't remember exactly.