The figure shows energy band diagrams for six different solids. http://session.m

Question

The figure shows energy band diagrams for six different solids.

http://session.masteringphysics.com/problemAsset/1013099/11/1013099A.jpg


s solid A a conductor, semiconductor, or insulator?
conductor
semiconductor
insulator


Part B
Is solid B a conductor, semiconductor, or insulator?
conductor
semiconductor
insulator


Part C
Is solid C a conductor, semiconductor, or insulator?
conductor
semiconductor
insulator


Part D
Is solid D a conductor, semiconductor, or insulator?
conductor
semiconductor
insulator


Part E
Is solid E a conductor, semiconductor, or insulator?
conductor
semiconductor
insulator


Part F
Is solid F a conductor, semiconductor, or insulator?
conductor
semiconductor
insulator


Part G
Which insulator has the largest dielectric breakdown voltage?
A
B
C
D
E
F

Explanation / Answer

conductor band can be defined as there is no energy gap between the conduction band and valency band

for insulator energy band gap >> 1eV

for semiconductror energy band gap << 1 eV

(a)   A is an insulator

(b)   B   is insulator

(c) C is conductor

(d) D is semiconductror

(e) E is semiconductor

(f) F is semiconductor

(g) A insulator has largest break down voltage which has largest energy band gap

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