Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Physics Study Materials Semiconductor Electronics Notes AMBIPi. This CUET Physics Notes are designed by analyzing to the CUET Syllabus and CUET Previous Years Questions Papers.
CUET Physics Notes
CUET Physics Semiconductor Electronics: Important Points to Remember
There are following important points in this chapter of Semiconductor Electronics.
- Fermi energy is the maximum possible energy possessed by free electrons of a metal at absolute zero temperature its value is different for different elements.
- n-type semiconductor is better than p-type semiconductor as electrons have more mobility than holes.
- For a given voltage applied conduction current in n-type semiconductor is more than that of p-type semiconductor.
- For a silicon p-n junction the barrier potential is about 0.7V, where as for a germanium p-n junction it is approximately 0.3V.
- An ideal diode permit only unidirectional conduction.
- Rectifier is a device which converts ac voltage to dc voltage. It is based on the fact that, a forward bias p-n junction
conducts and a reverse bias p-n junction does not conduct. - Zener diode is a special purpose diode in which the current suddenly increased in reverse bias condition after a certain voltage.
- Break down voltage is that voltage at which break down of semiconductor occurs. For Ge is 25V and for Si is 35V.
- Light emitting diode give out light radiations when forward biased.
- Solar cells converts solar energy into electrical energy.
- In a transistor circuit, the reverse bias is high as compared to the forward bias. So that it may exert a large attractive force on the charge carriers to enter the collector region.
- Semiconductors are the current control devices.
- The semiconductors devices are current sensitive devices.
- Current due to minority carriers in the junction diode is independent of the applied voltage. It only depends upon the
temperature of the diode. - Common collector amplifier is called power amplifier or current booster or emitter follower.
- Transistor provides good power amplification when they are used in CE configuration.
- A good emitter should have low work function, high melting point, high working temperature, high electrical and
mechanical strength. - NOR and NAND gates are universal gates because they can be used to perform the basic logic function, AND, OR and NOT.
- In modern day circuit, many logical gates or circuits are integrated in one single chip. These are known as integrated circuits (IC).
- Solar cells are also used in artificial satellite to operate the various electrical instruments kept inside the satellite.
- Solar cells are used in calculators, wrist watches and light meters.
- In Burglar – alarm systems, infrared LED’s are used.
- Semiconductor devices are not to be heated for emission of electrons. They start operating instantly. This saves a lot of electric power.
- Energy band diagram of conductor semiconductor & insulator
- P-N Junction (At Equilibrium Condition)
CUET Physics Semiconductor Electronics: Important Formulas
1. Intrinsic & Extrinsic Semiconductor
2. p–n Junction and Semiconductor Diode / Semiconductor Devices
3. Junction Transistor (N – P – N , P – N – P Transistors)
4. Logic Gates
CUET Physics Mock Test
Now, you have revised the this CUET Physics chapter. So, you must need to practice CUET Physics Sample Papers. By solving these CUET Physics questions, you will be more confident about your CUET preparations.
