Answer to Question 4



At a certain frequency, the voltage across a inductor is found to be 3.5 V while the voltage across the resistor is found to be 4.0 V.
a. Why is the total voltage not 7.5 V?
b. What is the resultant voltage?


The two voltages are 90 degrees out of phase.
The total voltage is the vector sum.


VR2 = 3.52 + 4.02 = 28.25


VR = 5.3 V