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National Bird Day: Why Birds Matter to Us

National Bird Day is celebrated every year on 5 January . This day is observed to spread awareness about birds, their importance in nature, and the need to protect them. Birds are beautiful living beings and play a very important role in keeping our environment healthy. Origin of National Bird Day National Bird Day was first celebrated in the year 2002 . It was started by bird lovers and environmental groups to protect birds from dangers like deforestation, pollution, and illegal hunting. The main aim of this day is to teach people, especially students, why birds are important and how we can help save them. Why Is National Bird Day Celebrated Every Year? National Bird Day is celebrated every year because many bird species are disappearing due to human activities. Cutting trees, using plastic, pollution, and climate change are harming birds and their homes. This day reminds us that: Birds need protection Nature should be respected Everyone has a responsibil...
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Zener diode and voltage regulation


  • A device which is used to convert alternating current (or voltage) into direct current (or voltage) is known as rectifier, and the process of converting a.c. into d.c. is known as rectification. The voltage obtained from a rectifier depends on the input a.c. voltage. It means with the variation in the input a.c. voltage the output of a rectifier also varies, and it does not remain constant, hence we get an unregulated output. The method used to make the output d.c. voltage constant or stable is voltage stabilization or voltage regulation, and the device which is used to make the output d.c. voltage constant is voltage stabilizer or voltage regulator. The main application of zener diode is that it provide a constant d.c. output, so it is used in voltage regulator circuit. So in this session we have discussed about the zener diode and voltage regulation. This session is divided into two parts firstly we discuss about the voltage regulation, where we discuss about the line regulation, load regulation, series regulator circuit and shunt regulator circuit. In the next session we discuss about the voltage stabilization by zener diode. Here we discuss how a zener diode stabilize the voltage and the operation of voltage stabilizer circuit using the zener diode. All these things are discussed here in this lecturer in Hindi and in English language, so it is better to understand the student of Hindi and English mediums. This topic is related to electronics and solid state physics.

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