The aim here is to install confidence and understanding of those concept of power system analysis that are likely to be encountered in the study and practice of Electric Power Engineering. Electric Utility and other industry-based engineers will find this textbook of much benefit in their everyday work. Without proper rendering support, you may see question marks, pdf bangla book on electronics, or other symbols. Bengal region of the Indian subcontinent.
It is 594 less than the AD or CE year in the Gregorian calendar if it is before Pôhela Bôishakh, or 593 less if after Pôhela Bôishakh. The revised version of the Bengali calendar was officially adopted in Bangladesh in 1987. According to Shamsuzzaman Khan, and Nitish Sengupta, the origin of the Bengali calendar is unclear. Some historians attribute the Bengali calendar to the 7th century Hindu king Shashanka. Hindus developed a calendar system in ancient times. The Hindu Vikrami calendar is named after king Vikramaditya and starts in 57 BCE.
In rural Bengali communities of India, the Bengali calendar is credited to “Bikromaditto”, like many other parts of India and Nepal. Various dynasties whose territories extended into Bengal, prior to the 13th-century, used the Vikrami calendar. The current Bengali calendar in use by Bengali people in the Indian states such as West Bengal, Tripura, Assam and Jharkhand is based on the Sanskrit text Surya Siddhanta. It retains the historic Sanskrit names of the months, with the first month as Baishakh. During the Mughal rule, land taxes were collected from Bengali people according to the Islamic Hijri calendar. This calendar was a lunar calendar, and its new year did not coincide with the solar agricultural cycles.
According to some sources, the current Bengali calendar owes its origin in Bengal to the rule of Mughal Emperor Akbar who adopted it to time the tax year to the harvest. It is unclear whether it was adopted by Hussain Shah or Akbar. The tradition to use the Bengali calendar may have been started by Hussain Shah before Akbar. According to Amartya Sen, Akbar’s official calendar “Tarikh-ilahi” with the zero year of 1556 CE was a blend of pre-existing Hindu and Islamic calendars. Shamsuzzaman states, “it is called Bangla san or saal, which are Arabic and Parsee words respectively, suggests that it was introduced by a Muslim king or sultan. In contrast, according to Sengupta, its traditional name is Bangabda. In the “Tarikh-e-Elahi” version of the calendar, each day of the month had a separate name, and the months had different names from what they have now.