At absolute zero temperature \( T = 0 \, {K} \), all the electrons in an intrinsic semiconductor are in the valence band and there are no free electrons in the conduction band.
Hence, it behaves like an insulator because no charge carriers are available for conduction.
Thus, the correct answer is (A).
Mass Defect and Energy Released in the Fission of \( ^{235}_{92}\text{U} \)
When a neutron collides with \( ^{235}_{92}\text{U} \), the nucleus gives \( ^{140}_{54}\text{Xe} \) and \( ^{94}_{38}\text{Sr} \) as fission products, and two neutrons are ejected. Calculate the mass defect and the energy released (in MeV) in the process.
Given: