Motor Effect F=BIL - Physics A-level Practical

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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.
  1. Malmesbury Education
  2. required
  3. edexcel
  4. gateway
  5. ocr
  6. gcse
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Комментарии
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Is there any particular reason why the copper wire used in this experiment is thick? Does it have anything to do with heating effects?

hpkperera
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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

fbdjwjflac
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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?

leonarddobbin
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