Hi Everyone,
I have a question about the Van Allen Belts. Is a Low Earth Orbit within the Inner Van Allen Belt and if so how would the radiation affect the satellites within a Low Earth Orbit?💫
Thanks in advance,
Coolmate
Hey! Sorry that this answer is a little late, but the inner Van Allen belt appears to be at a 1000km altitude or above in most areas, which would traditionally be considered higher than a LEO. Wikipedia (lol) tells me that some places it can have concentrations at lower altitudes though so in some places maybe? This is outside syllabus scope though
Hi!
Unsure about how to do this question- could someone please help?
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Thanks so much!
Your working is on the right track! We get the EMF by relating it to the change in flux, which you have spotted. Note the initial flux is zero (no magnetic field). So the change in flux is basically just whatever flux is from the current, divided by the time taken to switch that on (0.1s). The one missing piece for you I think is the formula which gives you a magnetic flux produced by a current in a solenoid. First, remember the difference between flux and flux density, \(\phi=BA\). That in mind, the formula you need is a Prelim formula:
So in summary the steps are:
- Figure out the strength of the magnetic field produced by the larger solenoid using the formula above (reference your Prelim notes!)
- Figure out how much flux this introduces in the smaller solenoid using \(\phi=BA\). Remember the \(A\) should be the area for the smaller solenoid because that is where the current is induced!
- Use this flux (also the change in flux, remember the initial flux is zero!) in \(\epsilon=\frac{\Delta \phi}{\Delta t}\) to determine the resultant induced emf.
Hopefully this is enough to let you have a go - It's a tough question (B6 level) so awesome job for wanting to explore it and understand it properly