alleryMotional emf shows an emf can be made without varying the:
ACircuit resistance
BAmbient pressure
CMagnetic field
DConductor length
Answer & Solution
Correct answer: C. Magnetic field
1. The usual route to an emf is to change the field.
2. Moving the conductor works instead.
3. So no variation of the magnetic field is needed.
_Source: syllabus Physics Part I, Chapter 6, Electromagnetic Induction._
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