The secondary watts of a transformer with a primary of 1,200 va and an efficiency of 92% is _ watts. ![]() Where: V is the voltage (volts) and I is the current (amps). LOL wow I have created a wtf formula, that sounds like I am not spot on:-) Why did I arrive to that totally wrong formula: V = sqr(VA * R) I took some examples on the internet like "300VA did that delivered 50V and 6 amp, like my formula sayes: sqr(300VA * 8Ohm) = 49V and 6 amp, an other was a 100VA that did deliver 28V and 3.5 amp. Structure of simple transformer is given below Voltage is applied to primary coil and, we take transformed voltage from secondary coil. Inductance of a coil is proportional to square of the number of turns in the coil. ![]() Calculate H and determine B from BH curve fit equation: 2.) The efficiency of a transformer is the ratio of the power it delivers to the load to the power it absorbs from the supply.
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