JEE Mains · Physics · STD 12 - 14. Semicondutor electronics
A common transistor radio set requires \(12\,V (D.C.)\) for its operation. The \(D.C.\) source is constructed by using a transformer and a rectifier circuit, which are operated at \(220\, V\) \((A.C.)\) on standard domestic \(A.C.\) supply. The number of turns of secondary coil are \(24,\) then the number of turns of primary are
- A \(220\)
- B \(110\)
- C \(440\)
- D \(880\)
Answer & Solution
Correct Answer
(C) \(440\)
Step-by-step Solution
Detailed explanation
\(\frac{ N _{ P }}{ N _{ S }}=\frac{ V _{ P }}{ V _{ S }}\) \(\frac{ N _{ P }}{24}=\frac{220}{12}\) \(N _{ P }=\frac{220 \times 24}{12}\) \(N _{ P }=440\)
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