Which quantity is increased in a step down transformer

Answer is B. A step down transformer is one whose secondary voltage is less than its primary voltage. It is designed to reduce the voltage from the primary winding to the secondary winding. This kind of transformer steps down the voltage applied to it. As a step-down unit, the transformer converts high-voltage, low-current power into low-voltage, high-current power.The larger-gauge wire used in the secondary winding is necessary due to the increase in current. The primary winding, which does not have to conduct as much current, may be made of smaller-gauge wire.

Hint: Power equals voltage times current, a transformer transfers power from the primary coil to the secondary coil. In words, in a step –down transformer the voltage decreases and current is proportional. Generally, a transformer performs two functions; to increase low Ac voltages at high current (Step-up transformer) and to decrease high AC voltage at low current(Step-down transformer) in electric power application and for the coupling stage of the signal processing circuit. Complete answer: It converts high voltage, low current power into a low voltage, high current power, in short a step-down transformer reduces the output voltages. If a step-down transformer, voltage decreases corresponding current increases. There is a difference between step- transformer and step-down transformer; in step-up transformers have more number of turns in their secondary coils however, in step-down transformers it consist of more number of turns in their primary coil. Step-down transformers are commonly used to convert the 220 volt electric found in most parts of the world to the 110 volts. Unfortunately, if the step-down transformer is used incorrectly it is very dangerous. Therefore the option (A) is the right answer. Note: If input supply is given on the low voltage winding, then it becomes a step-up transformer. Both step-up and step-down transformers use electromagnetic induction to convert voltage between two circuits. We can use both types in the distribution of power from supply s...