Question 470Electricity & Electronics - QMED

The correct answer is D) There will be an increase in the primary current. When the load on the secondary windings of a transformer increases, the primary current will increase to meet the increased demand from the secondary side. This is due to the principle of conservation of energy - the power input to the transformer must equal the power output from the transformer, minus any losses. As the load on the secondary side increases, the primary current must rise to deliver the additional power required. The other options are incorrect because: A) the primary current will increase, not decrease, B) the primary voltage will remain relatively constant, and C) the primary voltage will not decrease, it will remain steady.