Q.
In the given figure, among the diodes, the ones that are forward biased are

NTA AbhyasNTA Abhyas 2020
Solution:
When negative terminal of battery is connected to $N$ - side and positive terminal to $P$ - side ,the connection is called forward bias.
When negative terminal of battery is connected to $p$ -side and positive terminal to $N$ -side , the connection is called revese bias.
When negative terminal of battery is connected to $p$ -side and positive terminal to $N$ -side , the connection is called revese bias.