Question Detail
Question
Based on Lenz's Law as described in the document, if the magnetic flux through a circuit is decreasing, the induced emf will lead to an induced current that generates a magnetic field in which direction relative to the original flux?
Correct Answer
Option A is the correct answer.
Detailed Explanation
Slide 9 states: 'Decreasing magnetic flux ⇒ emf creates additional magnetic field'. To 'create additional magnetic field' means to produce a field in the same direction as the existing flux, thereby attempting to maintain the flux and oppose its decrease.
Hint
Lenz's Law always describes an opposition to the *change* in magnetic flux. If flux is decreasing, what must the induced field do?