If the magnets were the other way round (reversed direction) and the cradle "lifts off", then wouldn't the field strength be negative? (As -change of mass and +change of current). But how can magnetic field strength be negative?
Is there any reason for using both a variable resistor and a variable power supply? Surely you can just use the variable power supply to change the current
Is there any particular reason why the copper wire used in this experiment is thick? Does it have anything to do with heating effects?
As a good conductor, it allows a high current to flow with little heating.
If the magnets were the other way round (reversed direction) and the cradle "lifts off", then wouldn't the field strength be negative? (As -change of mass and +change of current). But how can magnetic field strength be negative?
Because it's a vector 😊
@@MalmesburyEducation With it being a vector, the negative sign accounts for the direction.
Fascinating!!
Is there any reason for using both a variable resistor and a variable power supply? Surely you can just use the variable power supply to change the current
You can. We use a variable resistor with a fixed power supply: Just seems to be easier to adjust for the values we want.
Very useful!
The force is real
Physics is real lol
Watched