Two electrons x and y travel at right angles to a uniform magnetic field. X experiences a magnetic force, Fx and Y experiences magnetic force Fy.
What is the ratio Fx/Fy if the kinetic energy of X is half that of Y ?
c) 1/root 2
Physics Unit 4 Multiple choice question watch
- Thread Starter
- 17-06-2016 16:21
- Official Rep
- 19-06-2016 17:40
Sorry you've not had any responses about this. Are you sure you've posted in the right place? Here's a link to our subject forum which should help get you more responses if you post there.
You can also find the Exam Thread list for A-levels here and GCSE here.
Just quoting in Puddles the Monkey so she can move the thread if needed
Spoiler:Show(Original post by Puddles the Monkey)
- 19-06-2016 17:47
C, half of 1/2mv^2 with constant mass (as both electrons) means that velocity is reduced by a factor of 1/sqrt(2)
- 19-06-2016 20:20
- 19-06-2016 21:40
Fx/Fy = Bqv/Bq(v/sqrt(2)) = 1/sqrt(2)
So still C.