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NEET2019PhysicsElectromagnetic InductionActual

The variation of EMF with time for four types of generators are shown in the figures. Which amongst them can be called AC? (a) (b) (c) (d)

Options

  1. A(a) (a) and (d)
  2. B(a), (b), (c) and (d)
  3. C(a) and (b)
  4. Donly (a)

Correct answer

B. (a), (b), (c) and (d)

Step-by-step solution

The emf generated due to a rotating conductor in a generator is given by E=- d _ B dt where, _B= magnetic flux linked with conductor From the above equation we can conclude that the emf generated is a varying function of time with opposite polarity. So, all the graph are correct for the given variations.

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