ব্যান্ডের তত্ত্বটি কবে আবিষ্কৃত হয় ?
According to Thevenin's Theorem in circuit theory, any potential source, current source and resistor assembly in a simple electrical network is equivalent to an electrical circuit with a single potential source and a resistor in series. It can be applied to a single frequency AC electrical network. , but there will be impedance and not just resistance. This theory was first discovered by the German scientist Hermann von Helmholtz in 1853. But it was rediscovered in 1883 by the French telegraph engineer Leon Charles Thevenin (1857–1926). According to this theory we can convert an electric circuit with potential source and resistor into a Thevenin equivalent electric circuit; which is a straightforward method
1931