In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is a/an

In the circuit diagram shown below , the magnitude and direction of the flow of current , respectively , would be

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

Assertion: If there is some gap between the conduction band and the valence band, electrons in the valence band all remain bound and no free electrons are available in the conduction band. Then the material is an insulator. Reason: Resistance of insulators is very low

If p is the resistivity of a material, and n is the number density of free electrons in it, the mean time between collisions between electrons in the material is given by: (m denotes the mass of an electron, and e denotes the charge on an electron)

Draw the "energy bands" diagram for a (i) pure semiconductor (ii) insulator. How does the energy band, foe a pure semiconductor, get affected when this semiconductor is doped with an acceptor impurity donor impurity? Hence discuss why the 'holes' and the 'electrons' respectively, become the 'majority charge carriers' in these two cases.

For the circle shown below, find the length. (in cm) of the largest cord of the circle.

Study the following diagram consisting of a circle, a rectangle and a triangle and answer the question given below it. If the circle is called 'rectangle rectangle is called triangle' and triangle is called 'circle', which number is only in the triangle but not in other two diagrams?

The energy band diagrams for three semiconductor samples of silicon are as shown. We can then assert that