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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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Electric field due to circular loop of charge | Electromagnetics

Electric field due to circular loop of charge

Electric field

  • The space around a charged particle in which another charge experience a force is known as electric field.
  • The source of electric field is either a charge or a time varying magnetic field.
  • If the value of electric field does not change with time, then it will be uniform electric field, otherwise it will be non-uniform electric field.

Electric field due to circular loop of charge


  • If λ is linear charge density, then the charge on dl
  • dq = λ dl     ⇒     dq = (q / 2πa) dl
  • Electric field at P due to charge dq

Special cases

  • When P lies at the centre of the loop i. e., r = 0, then E = 0
  • When P lies very far from the centre of the loop i. e., r >> a, then E = kq / r2
  • In this case circular loop behaves as a point charge.
To know more about this topic please click on the link https://youtu.be/54MIe0Ow43w  or  https://youtu.be/9bR1LfbVrGw



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