Question
Download Solution PDFA 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 _______.
Answer (Detailed Solution Below) 440
Detailed Solution
Download Solution PDFConcept:
For a transformer we know that :
This is the relation between a number of coils and voltage.
Calculation:
Given:
The number of turns in secondary coil is Ns = 24
Primary voltage, Vp = 220V, Secondary voltage, Vs = 12 V
The number of primary coils is NP =?
Equation (1) can be written as :
∴ The number of primary coils are = 440
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