[" and "r" tor which the current in "R" is maximum."],[" A battery of emf "100V" and a resistor of resistance "10k Omega],[" are joined in series.This system is used as a source to "],[" supply current to an external resistance "R." If "R" is not "],[" greater than "100Omega" ,the current through it is constant "],[" up to two significant digits.Find its value.This is the "],[" basic principle of a constant-current source."]