When secondary voltage is reduced what is it called?

Question

When a load is suddenly connected to a transformer, the secondary voltage will be reduced. This drop is called transformer __________

Answer 1

Regulation.

I didn't even need to look at your multiple choices.  Regulation is the correct answer.

Look up regulation in the index of your book and read about it in that section to find out the details of what it is.

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Answer 2

it is a Step Down Transformer,,

Primary = high tension or high voltage

Secondary = low tension or low voltage

Answer 3

It is called transformer sag. It is caused by the momentary inrush current.

Answer 4

regulation

u c regulation is always studied for transformers, this indicates how the transformer designed voltage will differ, increase or decrease, according to loads connected to it.

this is important to indicate whether the loads will tolerate this voltage drop/rise and function correctly healthly under these voltage ranges