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PhysicsNEET 2024Transformers

Alternating Current

In an ideal transformer, the turns ratio is NPNS=12\dfrac{N_P}{N_S} = \dfrac{1}{2}. The ratio VS:VPV_S : V_P is equal to (the symbols carry their usual meaning):

  1. A.2 : 1✓
  2. B.1 : 1
  3. C.1 : 4
  4. D.1 : 2

Solution

For an ideal transformer VSVP=NSNP\frac{V_S}{V_P} = \frac{N_S}{N_P}. With NPNS=12\frac{N_P}{N_S} = \frac12, VSVP=2\frac{V_S}{V_P} = 2, i.e. 2:12:1.

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