If the reverse current of a reverse biased junction increases to its maximum value, then the

Explanation

In a reverse-biased junction, when the reverse current reaches its maximum value, it indicates that the diode has entered the breakdown region. At this point, the voltage across the diode decreases to the breakdown voltage. This is because the diode allows a significant amount of current to flow in the reverse direction, which is characteristic of breakdown behavior. Option A is correct because it aligns with this behavior.Option B is incorrect because the voltage does not become zero; it stabilizes at the breakdown voltage. Option C is incorrect as the observation of resistance decreasing is a secondary effect, not the primary focus of what happens to voltage. Option D is incorrect because the diode's efficiency does not increase during breakdown; rather, the diode is in a state where it could potentially be damaged if current is not controlled.