- #1
Anthony physics
- 5
- 0
Ive asked this question before but i wrote it in a very confusing manner so ill do it again but in more qualitative terms:
The "classical railgun" i first learned about (mag field is produced by a permanent magnet) has a top speed because as the slug accelerates, the time derivative of mag flux increases continuously until induced voltage = voltage of battery.
However what about when the mag field is produced by the current running through the rails themselves? ( like the us navy railgun) It seems that there would never be a top speed because as current tends toward 0, so does mag flux and therefore the voltage created by faraday's law would never quite reach the battery voltage and acceleration will continue to exist. Is this true??
Note: for the purpose of this question please assume the only force involved is the lorentz force, do not include friction.
Thank you
The "classical railgun" i first learned about (mag field is produced by a permanent magnet) has a top speed because as the slug accelerates, the time derivative of mag flux increases continuously until induced voltage = voltage of battery.
However what about when the mag field is produced by the current running through the rails themselves? ( like the us navy railgun) It seems that there would never be a top speed because as current tends toward 0, so does mag flux and therefore the voltage created by faraday's law would never quite reach the battery voltage and acceleration will continue to exist. Is this true??
Note: for the purpose of this question please assume the only force involved is the lorentz force, do not include friction.
Thank you