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- 1. Multiple Choice
At room temperature, Silicon crystal is a
Good conductor
Semi Conductor
Bad Conductor
Insulator
- 2. Multiple Choice
The bond formation in a NaCl Crystal is
Metallic bond
Ionic bond
Covalent bond
van der Walls bond
- 3. Multiple Choice
According to Drude
the valence electrons of atoms move freely like gas molecules in a solid
the valence electrons of atoms move under coulomb field of atoms but they themselves do not apply any force on each other and like gas molecules in a solid
the valence electrons of atoms move under coulomb field of atoms
all electrons move freely in side solid
- 4. Multiple Choice
- 5. Multiple Choice
Drude's model is good enough to explain
Ohm's law and Widemann Franz law
Ohm's law and conduction in semiconductor
Ohm's law and Jule's law
Ohm's law anFaraday's law
- 6. Multiple Choice
Wiedemann Franz law
- 7. Multiple Choice
Differences of Drude's model and Somerfeld free electron theory is
Drude used particle picture and Somerfeld used wave picture
Drude used wave picture and Somerfeld used particle picture
Drude used only electronic case and Somerfeld considered both electron and hole
Drude used both for electron and hole and Somerfeld used only for electron
- 8. Multiple Choice
Energy of an electron accordingly to Somerfeld's free electron theory is
- 9. Multiple Choice
this picture represents electrons in infinite periodic potential
this picture represents electrons in a finite potential well
this picture represents electrons in a finite periodic potential well
this picture represents electrons in a infinite potential well
- 10. Multiple Choice
According to band theory
electrons are moving freely without any interaction btn. themselves or atomic nuclei
electrons are moving freely without any interaction btn. themselves but under Coulomb field of atomic nuclei
electrons are moving freely between Coulomb interaction btn. themselves but under Coulomb field of atomic nuclei
electrons are moving freely between mechanical interaction btn. themselves but under Coulomb field of atomic nuclei
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