Question

How does a step down transformer change current and voltage ?

• A. steps up current, steps down voltage
• B. steps up voltage,steps down current
• C. steps up power, steps downenergy
• D. steps up voltage, steps down power

Answer 1

The correct option is A steps up current, steps down voltage

A transformer used to convert the $AC$ voltage at its higher voltage input to lower voltage at its output without changing the frequency.

The step-down transformer converts high-voltage, into low-voltage, the power delivered remains same so the current is increased from the relation $P=VI$. The larger-gauge wire is used in the secondary winding because there is an increase in current at secondary coil.