In an ideal step-down transformer, out of the following quantities, which quantity increases in the…
In an ideal step-down transformer, out of the following quantities, which quantity increases in the secondary coil?
Power
Voltage
Current
Frequency
Solution
For an ideal transformer,
$\frac{\mathrm{V}_{\mathrm{s}}}{\mathrm{V}_{\mathrm{p}}}=\frac{\mathrm{I}_{\mathrm{p}}}{\mathrm{I}_{\mathrm{s}}}$
Hence, if $\mathrm{V}_{\mathrm{s}} < \mathrm{V}_{\mathrm{p}}$ then $\mathrm{I}_{\mathrm{p}} < \mathrm{I}_{\mathrm{s}}$
.