What is the ratio of number density of free electron and hole in a p-type Semi Conductor?

An n-type semi- conductor is

under the influence of electric field , which of the following statement is true about the movement of electrons and holes in p- type semiconducter ?

under the influence of electric field , which of the following statement is true about the movement of electrons and holes in p- type semiconducter ?

Answer the following: (i) Define the term drift velocity . (ii) On the basis of electron drift , derive an expression for resistivity of a conductor in terms of number density of free electrons and relaxation time. On what factors does resistivity of a coductor depend ? (iii) Why alloys like constantan and manganin are used for making standard restores ?

Two conductors of equal volumes having non-uniform cross-section are joined as show in figure. The number density of free electrons is more in conductor 2. As current passes through the system. Which of the following option is correct ?

Mobility of free electrons in a conductor is

The length of a current-carrying cylindrical conductor is l, its area of cross-section is A, the number density of free electrons in it is n, and the drift velocity of electrons in it is v_d . The number of electrons passing through a particular cross-section of the conductor per unit time is given by:

In diamond, the number of free electrons are:

What is the ratio of nuclear densities of the two nuclei having mass numbers in the ratio 1:4 ?

Region which have no free electron and holes in P-N junction is