$A$ diode operates at a constant potential drop of $0.5\, V$ for all currents and has a maximum power rating of $100\, mW$. If the source voltage is $1.5\, V$,what resistance must be connected in series with the diode so that the current in the circuit is at its maximum safe value? (in $\Omega$)

In an unbiased $n-p$ junction,electrons diffuse from $n-$ region to $p-$ region because

The cut-in voltage for a silicon diode is approximately $V$.

Two ammeters $A_1$ and $A_2$ are connected as shown in the given figure. By neglecting the internal resistance of the ammeters, the reading in the meter $A_1$ is (in $\text{A}$)

$A$ $P-N$ junction has a potential barrier of $0.5 \ V$. If an electron enters the $P-N$ junction diode from the $N$-side with a speed of $5 \times 10^5 \ m/s$,what will be its speed when it emerges from the $P$-side?

$A$ $2 \text{ V}$ battery is connected to a diode in forward bias. $A$ voltage of $0.5 \text{ V}$ is dropped across the diode,which is independent of the current flowing through it. $A$ current greater than $10 \text{ mA}$ causes excessive heating and damages the diode. If a current of $5 \text{ mA}$ is required in the diode,what value of series resistance must be connected in the circuit?