When the $P$ end of a $P-N$ junction is connected to the negative terminal of the battery and the $N$ end to the positive terminal of the battery,then the $P-N$ junction behaves like:

Find the current through the $1\,\Omega$ resistance in the given circuit.

What is a depletion barrier?

The increase in the width of the depletion region in a $p-n$ junction diode is due to

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.

Show the direction of the electric field that arises in a $p-n$ junction.