A 1:10 step-up transformer supplies a secondary
load of 600 resistance. If the primary voltage is
12V, the primary current will be
The answer is :- 3
Remember power is the same on both sides of the transformer - if the voltage is stepped up by a factor of 10, then the current must be stepped down by the same degree, a factor of 10.
If primary voltage is 12V then the secondary voltage will be 120V. By Ohm's law, secondary current = 120/600 = 0.2A. Therefore the primary current will be 10 times this value, i.e. 2A
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