The primary winding of a transformer has $100$ turns and its secondary winding has $200$ turns. The primary is connected to an ac supply of $120 \,V$ and the current flowing in it is $10 \,A$. The voltage and the current in the secondary are
- A$240 \,V, \,5 \,A$
- B$240 \,V, \,10 \,A$
- C$60 \,V, \,20 \,A$
- D$120 \,V, \,20 \,A$
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