Circle diagram Circle diagram First conceived by A. Heyland in 1894 and B.A. Behrend in 1895, the circle diagram is the graphical representation of the performance of the electrical machine drawn in terms of the locus of the machine's input voltage and current. The circle diagram can be drawn for alternators, synchronous motors, transformers, induction motors. The Heyland diagram is an approximate representation of circle diagram applied to induction motors, which assumes that stator input voltage, rotor resistance and rotor reactance are constant and stator resistance and core loss are zero. Another common circle diagram form is as described in the two
A Letter to a Hindu A Letter to a Hindu "A Letter to a Hindu" (also known as "A Letter to a Hindoo") was a letter written by Leo Tolstoy to Tarak Nath Das on 14 December 1908. The letter was written in response to two letters sent by Das, seeking support from the famous Russian author and thinker for India's independence from British colonial rule. The letter was published in the Indian newspaper "Free Hindustan". The letter caused the young Mohandas Gandhi to write to the world-famous Tolstoy to ask for advice and for permission to reprint the "Letter" in Gandhi's own South African