# Questions tagged [electromagnetism]

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### Highest frequencies of EMPs in space

When a nuke detonates, an EMP at about 100 MHz followd. A pulsar on the other hand, has a comparatively low frequency, and while I know that this frequency depends on its spin and doesn't represent ...
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### Can Lorentz forces partially cancel centrifugal forces?

If we had a tidally stabilised skyhook (https://en.wikipedia.org/wiki/Space_tether#/media/File:Skyhooks.gif) with electric charge and with a vector of force aiming towards the center of the Earth, ...
144 views

### What is the formula for the gain factor of a ferromagnetic core for a torquer coil rod?

I am an undergraduate who is currently designing an actuation system for a CubeSat, more specifically a PCB magnetorquer. (with 2 ferromagnetic core coils and one air core) I made an excel sheet that ...
31 views

### Velocity of a charged particle due to electric field in relativistic limit [closed]

I am trying to calculate the velocity of a charged particle moving through a constant E field. I understand that I can set $\frac{1}{2}mv^{2} = qV$ to give $v = \sqrt{\frac{2Vq}{m}}$ However, im not ...