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...
- 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. There are two type of rectifier half wave rectifier and full wave rectifier. A rectifier which converts only half cycle of input a.c. into d.c. is known as half wave rectifier and a rectifier which converts complete cycle of input a.c. into d.c. is known as full wave rectifier. Here in this session we have discussed only about full wave rectifier, and a brief idea of half wave rectifier is also given here. In this lecture we have determined the average value of current, rms value of current, efficiency of full wave rectifier, ripple factor and also about the frequency component. Here we have explained everything in Hindi and in English language, so it is bilingual lecture. This topic is related to electronics and solid state physics.
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