Question 19Electricity & Electronics - Assistant Engineer

The correct answer is C) The load is receiving one-half of line voltage and drawing two times line current. The reasoning is as follows: An autotransformer with a 50% tap means the output voltage is half the input voltage. Therefore, a load connected to the 50% tap will receive one-half of the line voltage. Since power is the product of voltage and current, to maintain the same power, the current will be doubled to compensate for the halved voltage. The other options are incorrect because: A) and D) state the load is receiving two times the line voltage, which is incorrect for the 50% tap. B) correctly states the load is receiving one-half of line voltage, but incorrectly states the current is also one-half.