BasicsOfPhysics

The highest filled energy band in a solid is called

• valence band

• conduction band

• fermi level

• equal level

The valence electrons do not directly measure the following property of a metal

• electrical conductivity

• thermal conductivity

• shear modulus

• metallic luster

Solids with high value of conductivity are called

• Conductors

• Non metal

• Insulators

• Semi Conductors

At zero kelvin semiconductors are

• Perfect metals

• Perfect semiconductor

• Perfect Non metals

• Perfect Insulators

The electrons in Valence bond are

• freely moving inside the solid

• tightly bonded inside the solid

• lies in the innermost orbits and cannot be made free

• lies in the outermost orbits and cannot be made free

At 0 K Conduction band will be

• fully occupied

• completely empty

• partially occupied by electrons

• partially occupied by holes

For metals Conduction band and valence Band are

• fully occupied

• empty

• Partially occupied

• Overlapping

The order of magnitude of the energy gap of a typical semiconductor is

• 0 eV

• 1-6 eV

• 10 eV

• 9 eV

Pure silicon at 0K is an

• Intrinsic semiconductor

• Extrinsic semiconductor

• metal

• insulator

At 0K, all the valence electrons in an intrinsic semiconductor

• are in the valence band

• are in the forbidden gap

• are in the conduction band

• are free electrons