Question

For germanium crystal, the forbidden energy gap in joules is(a) 1.12 × 10⁻¹⁹
(b) 1.76 × 10⁻¹⁹
(c) 1.6 ×10⁻¹⁹
(d) Zero

Answer 1

answer is 0.66 eV
so 1.056 × 10^ (-19)

Answer 2

Answer:

For germanium crystal, the forbidden energy gap in joules is(a) 1.12 × 10⁻¹⁹.

Explanation:

Germanium in the crystalline form has an energy gap between the valence band and conduction band. However, the pure intrinsic semiconductor can be converted into the p-type and n-type semiconductor.

Trivalent impurities if added to germanium then it forms the p-type semiconductor whereas if pentavalent impurities are added then it forms the n-type semiconductor.