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

Answer:

The rms output voltage of transformer is 10V

Explanation:

Since

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

$V_{2}$= Output Voltage of the Transformer

$V_{1}$ = Input Voltage

so

$V_{2} = \frac{N_{2} }{N_{1} } V_{1}$

So

$V_{2} = (1/12)(120)$

So the rms output voltage of transformer will be

$V_{2} = 10V$