Question
Download Solution PDFA step down transformer connected to an ac mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
If there are no power losses in the transformer than it is known as Ideal transformer. In an ideal transformer, input power is always equal to output power.
Calculation:
Given:
Vp = 220 V
Vs = 11 V
Power of lamp, P = 44W
In ideal transformer:
Input power = Output power
⇒ Vplp = Vsls = Given power
⇒ 220 × lp = 44
⇒ lp = 0.2 A
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