A. Frequency
B. Mutual Flux
C. Load current
D. Applied Voltage
Answer: C. Load current
Explanation:
In a Transformer, Core flux is the difference of primary flux and Secondary flux which are opposite to each other in direction.
So, some of the primary flux passes through the core and remaining becomes leakage flux (Because Secondary flux forces it to get out of the core).
The same is the case with Secondary flux. Now, flux is directly proportional to Voltage and Current.
When Current increases due to increased load (and voltage remains the same).Then both primary and secondary flux increase. Because both of them increases, so their difference remains the same. And all remaining flux is forced out. Hence leakage flux increases with current, but Core flux remains constant.
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