ANSWER:
a) 5 V
b) 8.33 A
c) step-up transformer
STEP-BY-STEP EXPLANATION:
a)
To calculate the input voltage it would be:
[tex]\begin{gathered} V_{\text{ in}}=\frac{P}{I} \\ V_{\text{ in}}=\frac{100}{20}=5\text{ V} \end{gathered}[/tex]b)
To calculate the output current it would be:
[tex]\begin{gathered} I_{\text{out}}=\frac{P}{V} \\ I_{\text{out}}=\frac{100}{12}=8.33\text{ A} \end{gathered}[/tex]c)
We have to:
Step-up transformer increase the output voltage.
Step-down transformer reduces the output voltage.
In this case, the voltage goes from being 5 V to being 12 V, therefore the output voltage increases, which means that it would be a step-up transformer.
