Mrs Wilkins shows you how to obtain a value for the magnetic flux density of a field by measuring the force on a current-carrying wire.
Пікірлер: 12
@cynv28084 жыл бұрын
Fascinating!!
@mattkepple4 жыл бұрын
Very useful!
@fbdjwjflac3 жыл бұрын
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
@andrewmasters50203 жыл бұрын
You can. We use a variable resistor with a fixed power supply: Just seems to be easier to adjust for the values we want.
@leonarddobbin20774 жыл бұрын
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?
@MalmesburyEducation4 жыл бұрын
Because it's a vector 😊
@vt.physics3 жыл бұрын
@@MalmesburyEducation With it being a vector, the negative sign accounts for the direction.
@hpkperera11724 жыл бұрын
Is there any particular reason why the copper wire used in this experiment is thick? Does it have anything to do with heating effects?
@MalmesburyEducation4 жыл бұрын
As a good conductor, it allows a high current to flow with little heating.