$A$ $PN-$ junction has a thickness of the order of

Which graph represents the variation of charge density with distance across a $P-N$ junction?

When a forward bias is applied to a $p-n$ junction,it

Statement $I :$ When a $Si$ sample is doped with Boron,it becomes $P$-type and when doped by Arsenic it becomes $N$-type semiconductor such that $P$-type has excess holes and $N$-type has excess electrons.
Statement $II$ : When such $P$-type and $N$-type semiconductors are fused to make a junction,a current will automatically flow which can be detected with an externally connected ammeter.
In the light of above statements,choose the most appropriate answer from the options given below.

Which of the following circuits is reverse-biased?

The circuit has two oppositely connected ideal diodes in parallel. What is the current flowing in the circuit (in $A$)?