What is the value of the current through the diode in the given circuit (in $\text{ mA}$)?

If the forward voltage in a semiconductor diode is doubled,the width of the depletion layer will

If the forward voltage in a diode is increased,the thickness of the depletion layer .......

The length of a germanium rod is $0.925 \ cm$ and its area of cross-section is $1 \ mm^2$. If for germanium $n_i = 2.5 \times 10^{19} \ m^{-3}$,$\mu_h = 0.19 \ m^2/V\cdot s$,and $\mu_e = 0.39 \ m^2/V\cdot s$,then the resistance of the rod is:

The forbidden energy gap of $Ge$ is $0.75 \ eV$. The maximum wavelength of incident photon radiation that can generate an electron-hole pair in a $Ge$ semiconductor is ........... $\mathring{A}$.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: $A$ diode under reverse-biased condition provides very small current which is nearly independent of voltage until a critical limit at which the current increases drastically.
Reason $R$: Below the critical voltage limit, only majority charge carriers flow which increases drastically above critical voltage.