Solving an AC problem

The following is an example of an AC problem. Click on the AC problem entry in the examination and training panel, and the circuit appears. Click the Interpreter button and the Interpreter window opens.

AC problems are normally too complex to allow a one line solution in the result field, so we use the Interpreter Window. But if the expression is small enough, we could use the result field also.

The problem is calculating the complex current through the inductor. First we define two complex variables ( Z and I ) to hold the complex impedance and the complex current. Using the Submit2 function we pass the result to the examination module.

The solution with the Interpreter

Z := j*VGw*L

I := VGA / Z

Abs(I)=[10]

Arc(I)=[-1.5708]

Submit2( 10[A], -1.5708 [rad] )

VGA stands for the voltage generator amplitude, while VGw stands for its radian frequency. It is good practice to review the results carefully before adding the Submit command to your solution. Once you press the Run button in a program containing the submit command, you are committed: TINA will check your solution, tell you if it is right or wrong, and submit it.