Whether the \( p\text{-}n \) junction diode is forward biased or reverse biased in the given figure.
The diode is reverse biased.
Step 1: In the given circuit, the negative terminal (\(-5V\)) is connected to the \( p \)-side, and the positive terminal (\(-3V\)) is connected to the \( n \)-side.
Step 2: Since the \( p \)-side is at a lower potential, the junction is reverse biased. \[ \boxed{\text{Reverse biased}} \]
Find the values of \( x, y, z \) if the matrix \( A \) satisfies the equation \( A^T A = I \), where
\[ A = \begin{bmatrix} 0 & 2y & z \\ x & y & -z \\ x & -y & z \end{bmatrix} \]