Explanation:
A In a step-down transformer, the output voltage is lower than the input voltage, while the output current is higher than the input current.
According to the transformer equation,
$\frac{\mathrm{V}_{\text {primary }}}{\mathrm{V}_{\text {socosiny }}}=\frac{\mathrm{N}_{\text {priwary }}}{\mathrm{N}_{\text {secondry }}}$
Here, power is conserved in the transformer. Product of the voltage and current remains the same in both coils. Therefore, if the voltage is decreased in the secondary coil, the current must be increased in order to keep the