$A$ $12\,V, 60\,W$ lamp is connected to the secondary of a step-down transformer, whose primary is connected to $AC$ mains of $220\,V$. Assuming the transformer to be ideal, the current in the primary winding is $..........\,A$.
- A$0.37$
- B$0.27$
- C$2.7$
- D$3.7$
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