A step-down transformer has a power output of 50 W and efficiency of 80%. if the mains supply voltage is 200 v, calculate the primary current of the transfo...
Question 1 Report
A step-down transformer has a power output of 50 W and efficiency of 80%. if the mains supply voltage is 200 v, calculate the primary current of the transformer.
Answer Details
The formula for calculating the primary current of a transformer is:
Primary current = (Power output / Mains voltage) / Efficiency
Where the power output is given as 50 W, the mains voltage is given as 200 V, and the efficiency is given as 80% or 0.8.
Substituting these values in the formula, we get:
Primary current = (50 / 200) / 0.8
Primary current = 0.3125 A or 0.31 A (rounded to two decimal places)
Therefore, the primary current of the transformer is 0.31 A.
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