The circuit diagram shown here corresponds to the logic gate,

The output of a NOR gate is 1 if _____

The current in ideal $(P-N)$ junction diode shown in circuit is

In the figure given, voltage of point $A$ is (consider diode is ideal)

Four equal resistors, each of resistance $10 \mathrm{ohm}$ are connected as shown in the adjoining circuit diagram. Then the equivalent  resistance between points $A$ and $B$ is

The circuit shown in the figure contains two diodes each with a forward resistance of $50 \mathrm{\Omega }$ and with infinite reverse resistance. If the battery voltage is $6 \mathrm{V}$, find the current through the $100 \mathrm{\Omega }$ resistance.

A semiconductor $X$ is made by doping a germanium crystal with arsenic $\left(Z=33\right)$. A second semiconductor $Y$ is made by doping germanium with indium $\left(Z=49\right)$. The two are joined end to end and connected to a battery as shown in the figure. Which of the following statements is correct?