Ncert Exercises & Solutions

Select the correct option based on statements below:

Assertion (A):	Semiconductors are solids with conductivities in the range from 10^-6 — 10⁴ohm^-1 m^-1.
Reason (R):	Intermediate conductivity in semiconductors is due to a partially filled valence band.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.