In the following circuit, the equivalent resistance between X and Y is ...... \( \Omega \):
According to the given figure, X is at a lower potential with respect to Y. Hence, both diodes are in reverse biasing, so the equivalent circuit can be redrawn as follows:
Equivalent Resistance Calculation:
\[ R_{{eq}} = 8 + 2 + 6 = 16\Omega \]
If the roots of the quadratic equation \( ax^2 + bx + c = 0 \) are real and equal, then: