Materials And Components - Study Mode

[#121] In van der walls crystals, there exists a high degree of stability of the outer electron shell.
Correct Answer

(A) True

[#122] On the basis of the type of chemical bonds, solids may be classified into
Correct Answer

(D) Ionic crystals, valence crystals, metal and vander wall crystals

[#123] Which of the following are true for relative dielectric constant? 1. It is dimensionless. 2. It is equal to 1 for vacuum. 3. It is equal to 1 for all substances.
Correct Answer

(A) 1 and 2 only

[#124] In an intrinsic semiconductor, at a given temperature T
Correct Answer

(A) The number of electrons-hole pairs generated per second due to thermal motion are equal to the number of electron-hole pairs lost per second due to recombination

[#125] The resistance of a photoconductor
Correct Answer

(B) Decreases with increase in light intensity