Degeneracy of states: time independent perturbation theory

Dear Students

        The first order correction in energy eigen values related to a two fold degeneracy states using time independent perturbation theory has been discussed here.

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BJT: Common Emitter Characteristics

Class code: 16 & 17, course code: PY1543

Dear Students

          In this class the common emitter connection in npn and pnp transistors and its characteristics have been discussed.

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BJT connections: Common Base Characteristics

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     Please find the lecture attached to the link.

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Bipolar Junction Transistors

Dear students

         In the last class we discussed an introduction to transistors. In fact we made an introduction to Bipolar Junction Transistors (BJT). The name BJT has been used for this type of transistors, because of having two polarity charge carriers , viz., electrons and holes, corresponding to npn and pnp transistors.

        There is another type of transistors called , Field Effect Transistors (FET), which is not discussed here. So far we have used the word transistor for BJT alone, and will continue the same, till otherwise FET has to be mentioned. 

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Introduction to transistors

Dear students

    Here I am providing a short introduction to transistors

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Zener diode

Dear students

In this class we discuss Zener diodes

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Time independent perturbation theory

Reach at exact solution to Schrodinger equation is almost practically impossible , especially when the potential energy of the system is verying. When the changes in potential energy is very small, we use approximation technique like perturbation theory to solve the Schrodinger equation. Perturbation means small changes in potential energy of the system. Here we discuss the time independent perturbation theory to reach at proximate solution to a perturbed system.

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Filter circuits

                         🌸🌸🌸🌸

Dear Students

    In this class we will discuss the various filter circuits used in rectifier circuits.

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Full wave rectifiers

                        🌼🌼🌼🌼🌼

Dear students

         In this class we will discuss the different types of full wave rectifiers, their efficiency , advantages , disadvantages and ripple factor.

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