For germanium the forbidden energy gap is_______________?

Related Mcqs:

1. The forbidden gap in an insulator is________________?

   A. large B. small C. nil D. any of the above...

2. Mercury as an electric contact material is_______________?

   A. a liquid B. a metal C. a metal liquid D. a gas...

3. An H.R.C. fuse is_______________?

   A. a ceramic body having metal and caps B. a wire of platinum C. a heavy cross-section of copper or aluminium D. a ceramic tube having carbon rod inside it...

4. The kinetic energy of a bounded electron is______________?

   A. less than that of unbounded electron B. greater than that of unbounded electron C. equal to that of unbounded electron D. infinite E. none of the above...

5. Which of the following materials is preferred for transmitting electrical energy over long distance ?

   A. Copper B. Aluminium C. Steel reinforced copper D. Steel reinforced aluminium...

6. 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...

7. The superconductivity is due to____________?

   A. the crystal structure having no atomic vibration at 0°K B. all electrons interact in the super-conducting state C. the electrons jump into nucleus at 0°K D. none of the above...

8. Which of the following is the poorest conductor of electricity ?

   A. Carbon B. Steel C. Silver D. Aluminium...

9. Due to which of the following factors the brush wear rate is altered ?

   A. Speed of the machine B. Contact pressure C. Surface conditions of brush and commutator D. Excessive sparking E. All of the above...

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

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