Hello!
The answer is:
The voltage of the source is 8.40 Volts.
Why?
To solve the problem, we need to use the Ohm's Law equation base formula.
We have that we can calculate the voltage using the following equation:
[tex]Voltage(Volts)=Current(Amps)*Resistance(Ohm)[/tex]
So, from the statement we know that:
[tex]Resistance=2.21\Omega\\Power=32W\\Current=3.8A[/tex]
Now, substituting and calculating we have:
[tex]Voltage(Volts)=Current(Amps)*Resistance(Ohm)[/tex]
[tex]Voltage(Volts)=3.8A*2.21\Omega=8.40V[/tex]
Hence, we have that the voltage of the source is 8.40 Volts.
Have a nice day!
