Semiconductor Diode

To determine the biasing of diodes in the full wave rectifier at ms, we need to calculate the input voltage at this specific time instant. Given the input voltage equation:

We substitute ms (which is seconds) into the equation:

Calculating the argument of the sine function:

Since , the input voltage becomes:

In a full wave rectifier, during the positive half-cycle of the input AC signal, usually is forward biased and is reverse biased. Conversely, during the negative half-cycle, the input voltage is negative, leading to being reverse biased and being forward biased. At ms, since the input voltage is volts (negative half-cycle), becomes reverse biased, and becomes forward biased.

Thus, the diodes' biasing is: is forward biased, is reverse biased.