The dependence of the logarithm of conductivity, In o, on `1/T` for two semiconductors is shown schematically in the figure. In which respect do these semiconductors differ?

The conductivity of a semiconductor depends upon

Which of the energy band diagrams shown in the figure corresponds to that of a semiconductor?

The temperature (T) dependence of resistivity (rho) of a semiconductor is represented by :

Assertion: The conductivity of an intrinsic semiconductor depends on its temperature. Reason The conductivity of an intrinsic semiconductor is slightly higher than that of a lightly doped p-type semiconductor.

Statement 1: Conductivity of semiconductor increases with increase in temperature. Statement 2: Forbidden energy gap is highest for semiconductors.

What do you understand by electrical conductivity of a semiconductor? Find a relation for the same.

What is the difference between the two mice as shown as in the figure?

Is it difficult to make an intrinsic semiconductor? Name two factors on which the electrical conductivity of intrinsic semiconductor at a given temperature depends. How does the conductivity of a semiconductor change with the rise in its temperature?

A pure semiconductor germanium or silicon, free of every impurity is called intrinsic semiconductor. A room temperature, a pure semiconductor has a very small number of current carriers (electrons and holes). Hence, its conductivity is low. When the impurity atoms of valence five or three are doped in a pure semiconductor, we get repectively n-type ot p-type extrinsic semiconductor. In case of a doped semiconductor. n_(e)n_(h)=n_(i)^(2) , where n_(e) and n_(h) are the number density of electrons and holes respectively and n_(i) is the number density of intrinsic charge carriers in a pure semiconductor. The conductivity of extrinsic semiconductor is much higher than that of intrinsic semiconductor. (i) Name two materials to be doped in pure semiconductor of silicon to get p-type semiconductor n-type semiconductor. (ii) What do you learn from the above study?