The forbidden gap in an insulator is________________?

Related Mcqs:

1. For germanium the forbidden energy gap is_______________?

   A. 0.15 eV
   B. 0.25 eV
   C. 0.5eV
   D. 0.7eV

2. The converse of hardness is known as______________?

   A. malleability
   B. toughness
   C. softness
   D. none of the above

3. High resistivity materials are used in_____________?

   A. precision instruments
   B. heating elements
   C. motor starters
   D. incandescent lamps
   E. all of the above

4. At transition temperature the value of critical field is____________?

   A. zero
   B. negative real value
   C. positive real value
   D. complex value

5. __________ is the main constituent of glass?

   A. Fe203
   B. Si02
   C. AI2O3
   D. B2O3

6. Most of the common metals have _________ structure?

   A. linear
   B. hexagonal
   C. orthorhombic
   D. cubic

7. Carbon rods are used in wet and dry cells because_____________?

   A. carbon rod serves as conductor
   B. carbon can resist the attack of battery acid
   C. both (A) and (B)
   D. either (A) or (B)

8. Steel wire is used as____________?

   A. overhead telephone wire
   B. earth wire
   C. core wire of ACSR
   D. all of the above

9. Copper, even though costly, finds use in the windings of electrical machines because_____________?

   A. copper points offer low contact resistance
   B. copper can be easily soldered and welded
   E. copper windings are less bulky and the machines become compact
   D. all of the above

10. The current due to electron flow in conduction band is the hole current in valence band?

    A. equal to
    B. less than
    C. greater than
    D. any of the above