With increase in temperature, the electrical conductivity of semiconductors

A. Increases

B. Decreases

C. Remain constant

D. Either (A) or (B), depends on the type of semi-conductor

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. Between 230 and 370°C, blue brittleness is caused in mild steel because of the
  2. Pick out the wrong statement.
  3. Induced draft fans provided in large thermal power plant boilers have __________ blades.
  4. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial…
  5. Speed of a submarine in deep sea & that of an aeroplane is measured by a/an
  6. Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________…
  7. Pick out the wrong statement.
  8. The property of material, by which a given amount of energy is absorbed by it, without plastic deformation,…
  9. Function of gear box is to
  10. Particle nature of cathode rays is proved due to the fact that they
  11. Steel & cast iron pipes are produced by __________ casting.
  12. Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an…
  13. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic…
  14. __________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in…
  15. Satellites burn off during re-entry to earth's atmosphere, because of the
  16. Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.
  17. The underground well of a biogas plant is called the
  18. The most important function of a washer is to provide bearing area and washers are normally specified…
  19. Which of the following is an acidic constituent of B.F. slag?
  20. The lightest non-inflammable gas is
  21. In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just…
  22. __________ is not a heat treatment process.
  23. Which of the following rays has the least wavelength?
  24. The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost…
  25. 'Flare tower' used in industry is meant for
  26. The same volume of all gases is representative of their
  27. __________ property of a material is determined by the Herbert Pendulum device.
  28. Starting friction is low in case of the __________ lubrication.
  29. Nuclear fission of one atom of uranium-235 produces the energy equivalent to about __________ MeV.
  30. Which of the following mainly decides the current to be employed is arc welding?