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...

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.