A battery of emf \( 100 \mathrm{~V} \) and a resistor of resistance \( 10 \mathrm{k} \Omega \) a...

A battery of emf \( 100 \mathrm{~V} \) and a resistor of resistance \( 10 \mathrm{k} \Omega \) 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 \( 100 \Omega \), the current through it is constant up to two significant digits. Find its value. This is the basic principle of a constant-current source.