Question

1-For an Insulator that is still is insulating at 500K, which of the following statements are...

1-For an Insulator that is still is insulating at 500K, which of the following statements are correct?

a.

CB band is completely empty and VB is completely filled.
b.

CB band is completely filled and VB is completely empty.
c.

CB band is partially empty and VB is completely filled.
d.

VB band is partially empty and CB is completely filled.
e.

None of the above

2-For a metal at 500K, (The metal remains a solid) which of the following statements are correct?

a.

Both bands are completely filled.
b.

At least one band is partially empty.
c.

Both bands are completely empty
d.

Both bands may be partially empty
e.

At least one band is partially filled.

3-If a semiconductor doped with donor concentration ND, which of the following is correct?

a.

EF = Ei
b.

EF = EC
c.

EF = ED
d.

EF = EV
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