Question

10. What is the turns ratio of a transformer? What can you say
about its value for a (i) step-up transformer (ii) step-down
transformer?​

Answer 1

Explanation:

The number of turns on the secondary of the transformer is greater than that of the primary, i.e., T2 > T1. Thus the voltage turn ratio of the step-up transformer is 1:2.

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Answer 2

Answer:

Turn ratio is the ratio of the number of turns of secondary windings to the number of turns on the primary windings of the transformer.

(i)  Step-up transformer= Ns >Np.

(ii) Step-down transformer=Ns<Np.

Explanation:

• The turn ratio of a transformer is defined as the ratio of the number of turns on its secondary windings to the number of turns on the primary windings of the transformer.

           $T=\frac{N_s}{N_p}$     (1)

   Where,

    T=turn ratio of the transformer

    Ns=number of turns in the secondary coil

    Np=number of turns in the primary coil

• The turn ratio for the step-up transformer is Ns >Np.
• The turn ratio for the step-down transformer is Ns<Np.