An operational amplifier is a

The curve between charge density and distance near a $P-N$ junction will be:

Reverse bias applied to a junction diode

The diode used in the circuit has a barrier voltage of $0.5\,V$ and a maximum power rating of $10\,mW$. What should be the minimum value of resistance $R$ connected in series with the diode?

In the given figure,the potential difference between $A$ and $B$ is :-............. $V$

In an ideal junction diode, the current flowing through $PQ$ is (resistance is $2 \text{ k}\Omega$).