The impurity atoms is semiconductors_____________?

Related Mcqs:

1. By increasing impurity content in the metal alloy the residual resistivity always_____________?

   A. decreases B. increases C. remains constant D. becomes temperature independent...

2. The tiny block formed by the arrangement of a small group of atoms is called the____________?

   A. unit cell B. space lattice C. either A. or (b) D. none of the above...

3. The number of atoms per unit cell in B.C.C. structure is_____________?

   A. 1 B. 2 C. 4 D. 8...

4. is an element used in semiconductors whose atoms have three valence electrons?

   A. An acceptor B. A donor C. Germanium D. Silicon...

5. The formula __________ determines the number of electrons that can be accommodated in any level?

   A. 2n2 B. 4n2 C. 2n3 D. 4ns...

6. Which of the following resistive materials has the lowest temperature co-efficient of resistance ?

   A. Nichrome B. Constantan C. Kanthal D. Molybdenum...

7. ___________ is most commonly used for making magnetic recording tape?

   A. Silver nitrate B. Ferric oxide C. Small particles of iron D. Silicon-iron...

8. The resistivity of a metal is a function of temperature because_____________?

   A. the amplitude of vibration of the atoms varies with temperature B. the electron density varies with temperature C. the electron gas density varies with temperature...

9. Which of the following material is not a semiconductor ?

   A. Silica B. Germanium C. Selenium D. Gallium-arsenide...

10. In conductors conduction of electricity takes place due to movement of_______________?

    A. electrons only B. positive ions only C. negative ions only D. positive and negative ions E. none of the above...