Question

A step-down transformer is used for recharging the batteries of portable electronic devices. The turns ratio N2/N1 for a particular transformer used in a DVD player is 1:12. When used with 120-V (rms) household service, the transformer draws an rms current of 33.5 mA from the house outlet.

Answer 1

The rms output voltage of transformer is 10V

Step-by-step explanation:

Since

Output Voltage of the Transformer = (N2/N1)(Input Voltage)

`V_(2)`= Output Voltage of the Transformer

`V_(1)` = Input Voltage

so

`V_(2) = (N_(2) )/(N_(1) ) V_(1)`

So

`V_(2) = (1/12)(120)`

So the rms output voltage of transformer will be

`V_(2) = 10V`